Support for yang actions in path API

[ghost]

• Add support for parsing yang 1.1 module capabilities
• Tests, docs
• Add libydk option to generate.py to generate libydk package

[codecov]

Codecov Report

Merging #717 into master will increase coverage by 0.32%.
The diff coverage is 97.44%.

@@            Coverage Diff             @@
##           master     #717      +/-   ##
==========================================
+ Coverage   79.14%   79.47%   +0.32%     
==========================================
  Files         172      172              
  Lines       15918    16139     +221     
  Branches     1431     1433       +2     
==========================================
+ Hits        12599    12826     +227     
+ Misses       2975     2969       -6     
  Partials      344      344

Impacted Files	Coverage Δ
sdk/cpp/core/src/path_api.hpp	71.42% <ø> (ø)	⬆️
sdk/cpp/core/tests/test_codec.cpp	100% <100%> (ø)	⬆️
sdk/cpp/core/src/path/restconf_session.cpp	89.79% <100%> (+0.21%)	⬆️
sdk/cpp/core/tests/test_capabilities_parser.cpp	100% <100%> (ø)	⬆️
sdk/cpp/core/tests/mock_data.hpp	100% <100%> (ø)	⬆️
sdk/cpp/core/src/path/capability.cpp	60.97% <100%> (+24.13%)	⬆️
generate.py	81.74% <100%> (+0.62%)	⬆️
sdk/python/core/tests/test_sanity_path.py	99.15% <100%> (+0.09%)	⬆️
sdk/cpp/core/src/path/netconf_model_provider.cpp	93.87% <100%> (+0.12%)	⬆️
sdk/cpp/core/src/path/path.cpp	82.75% <100%> (+0.11%)	⬆️
... and 9 more

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