Write values to register

[f1ammable]

Also refactored some bits of the command parser

• Subcommand handling is now moved to a parent class, no longer needing to override Callable::call with the same if statements
• Properly handle hex literals in the scanner, no longer needing to write out addresses as strings ("0x10000")
• Subcommands now take their arguments in the form of std::vector<Object>& args with extraction helpers in src/cmd/util.hpp with detail::AsString and detail::AsU64
• Subcommands no longer need to check for a running/valid target, that's been moved into a lambda wrapper

[github-actions]

Code Coverage Report

### Per-File Coverage Summary
Filename                      Regions    Missed Regions     Cover   Functions  Missed Functions  Executed       Lines      Missed Lines     Cover    Branches   Missed Branches     Cover
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
cmd/callable.hpp                   17                 4    76.47%           5                 0   100.00%          22                 1    95.45%           8                 5    37.50%
cmd/environment.cpp                19                 0   100.00%           5                 0   100.00%          41                 0   100.00%          10                 0   100.00%
cmd/environment.hpp                 2                 0   100.00%           1                 0   100.00%           9                 0   100.00%           0                 0         -
cmd/expr.hpp                       38                 3    92.11%          25                 3    88.00%          64                 7    89.06%           2                 0   100.00%
cmd/interpreter.cpp                55                 2    96.36%          18                 0   100.00%         147                 5    96.60%          46                 3    93.48%
cmd/object.hpp                     25                 1    96.00%          17                 1    94.12%         120                 2    98.33%           2                 0   100.00%
cmd/parser.cpp                    102                 2    98.04%          21                 0   100.00%         144                 0   100.00%          62                 6    90.32%
cmd/parser.hpp                     19                 0   100.00%           1                 0   100.00%           3                 0   100.00%          16                 0   100.00%
cmd/scanner.cpp                    87                 3    96.55%          12                 0   100.00%         130                 9    93.08%          74                 6    91.89%
cmd/scanner.hpp                     1                 0   100.00%           1                 0   100.00%           4                 0   100.00%           0                 0         -
cmd/stdlib.hpp                    116                93    19.83%          32                16    50.00%         194               138    28.87%          54                51     5.56%
cmd/stmnt.hpp                      13                 1    92.31%           8                 1    87.50%          14                 1    92.86%           0                 0         -
cmd/subcommand.hpp                  7                 0   100.00%           2                 0   100.00%          10                 0   100.00%           2                 0   100.00%
cmd/token.hpp                       4                 0   100.00%           1                 0   100.00%           3                 0   100.00%           0                 0         -
cmd/util.cpp                       32                22    31.25%           4                 3    25.00%          54                39    27.78%          28                24    14.29%
cmd/util.hpp                       18                18     0.00%           2                 2     0.00%          22                22     0.00%          10                10     0.00%
core/context.hpp                    3                 2    33.33%           3                 2    33.33%           8                 7    12.50%           0                 0         -
core/macho/macho.hpp                2                 2     0.00%           2                 2     0.00%           2                 2     0.00%           0                 0         -
core/platform.hpp                  16                15     6.25%           7                 6    14.29%          51                48     5.88%          11                11     0.00%
core/target.cpp                    23                23     0.00%           6                 6     0.00%          59                59     0.00%          12                12     0.00%
core/target.hpp                     5                 5     0.00%           5                 5     0.00%           5                 5     0.00%           0                 0         -
core/util.hpp                       7                 7     0.00%           7                 7     0.00%         104               104     0.00%           0                 0         -
error.cpp                           6                 3    50.00%           6                 3    50.00%          24                12    50.00%           0                 0         -
error.hpp                           8                 0   100.00%           2                 0   100.00%          21                 0   100.00%           0                 0         -
expected.hpp                       13                13     0.00%           9                 9     0.00%           9                 9     0.00%           0                 0         -
formatter.hpp                      58                 0   100.00%           9                 0   100.00%          99                 2    97.98%           2                 0   100.00%
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
TOTAL                             696               219    68.53%         211                66    68.72%        1363               472    65.37%         339               128    62.24%

Detailed HTML report available in artifacts.

[github-actions]

Code Coverage Report

### Per-File Coverage Summary
Filename                      Regions    Missed Regions     Cover   Functions  Missed Functions  Executed       Lines      Missed Lines     Cover    Branches   Missed Branches     Cover
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
cmd/callable.hpp                   17                 4    76.47%           5                 0   100.00%          22                 1    95.45%           8                 5    37.50%
cmd/environment.cpp                19                 0   100.00%           5                 0   100.00%          41                 0   100.00%          10                 0   100.00%
cmd/environment.hpp                 2                 0   100.00%           1                 0   100.00%           9                 0   100.00%           0                 0         -
cmd/expr.hpp                       38                 3    92.11%          25                 3    88.00%          64                 7    89.06%           2                 0   100.00%
cmd/interpreter.cpp                55                 2    96.36%          18                 0   100.00%         147                 5    96.60%          46                 3    93.48%
cmd/object.hpp                     25                 1    96.00%          17                 1    94.12%         120                 2    98.33%           2                 0   100.00%
cmd/parser.cpp                    102                 2    98.04%          21                 0   100.00%         144                 0   100.00%          62                 6    90.32%
cmd/parser.hpp                     19                 0   100.00%           1                 0   100.00%           3                 0   100.00%          16                 0   100.00%
cmd/scanner.cpp                    87                 3    96.55%          12                 0   100.00%         130                 9    93.08%          74                 6    91.89%
cmd/scanner.hpp                     1                 0   100.00%           1                 0   100.00%           4                 0   100.00%           0                 0         -
cmd/stdlib.hpp                    116                93    19.83%          32                16    50.00%         194               138    28.87%          54                51     5.56%
cmd/stmnt.hpp                      13                 1    92.31%           8                 1    87.50%          14                 1    92.86%           0                 0         -
cmd/subcommand.hpp                  7                 0   100.00%           2                 0   100.00%          10                 0   100.00%           2                 0   100.00%
cmd/token.hpp                       4                 0   100.00%           1                 0   100.00%           3                 0   100.00%           0                 0         -
cmd/util.cpp                       32                22    31.25%           4                 3    25.00%          54                39    27.78%          28                24    14.29%
cmd/util.hpp                       18                18     0.00%           2                 2     0.00%          22                22     0.00%          10                10     0.00%
core/context.hpp                    3                 2    33.33%           3                 2    33.33%           8                 7    12.50%           0                 0         -
core/macho/macho.hpp                2                 2     0.00%           2                 2     0.00%           2                 2     0.00%           0                 0         -
core/platform.hpp                  16                15     6.25%           7                 6    14.29%          51                48     5.88%          11                11     0.00%
core/target.cpp                    23                23     0.00%           6                 6     0.00%          59                59     0.00%          12                12     0.00%
core/target.hpp                     5                 5     0.00%           5                 5     0.00%           5                 5     0.00%           0                 0         -
core/util.hpp                       7                 7     0.00%           7                 7     0.00%         104               104     0.00%           0                 0         -
error.cpp                           6                 3    50.00%           6                 3    50.00%          24                12    50.00%           0                 0         -
error.hpp                           8                 0   100.00%           2                 0   100.00%          21                 0   100.00%           0                 0         -
expected.hpp                       13                13     0.00%           9                 9     0.00%           9                 9     0.00%           0                 0         -
formatter.hpp                      58                 0   100.00%           9                 0   100.00%          99                 2    97.98%           2                 0   100.00%
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
TOTAL                             696               219    68.53%         211                66    68.72%        1363               472    65.37%         339               128    62.24%

Detailed HTML report available in artifacts.