Add kconfig command

[gsingh93]

Add a kconfig command to print the current kernel config.

pwndbg> kconfig
CONFIG_GCC_VERSION = 0
CONFIG_CC_IS_CLANG = y
CONFIG_CLANG_VERSION = 140007
pwndbg> kconfig debug_info
CONFIG_DEBUG_INFO = y
pwndbg> kconfig config_debug_info
CONFIG_DEBUG_INFO = y
pwndbg> kconfig CONFIG_DEBUG_INFO
CONFIG_DEBUG_INFO = y
pwndbg> kconfig nonexistent_option
Config CONFIG_NONEXISTENT_OPTION not set
pwndbg> ipi

In [1]: pwndbg.gdblib.kernel.kconfig.debug_info
Out[1]: 'y'

In [2]: pwndbg.gdblib.kernel.kconfig.config_debug_info
Out[2]: 'y'

In [3]: pwndbg.gdblib.kernel.kconfig.nonexistent_option

In [4]: pwndbg.gdblib.kernel.kconfig['nonexistent_option']
---------------------------------------------------------------------------
KeyError                                  Traceback (most recent call last)
Cell In [4], line 1
----> 1 pwndbg.gdblib.kernel.kconfig['nonexistent_option']

File ~/tools/pwndbg/pwndbg/lib/kernel/kconfig.py:51, in Kconfig.__getitem__(self, name)
     48 if key:
     49     return self.data[key]
---> 51 raise KeyError(f"Key {name} not found")

KeyError: 'Key nonexistent_option not found'

[codecov-commenter]

Codecov Report

Merging #1425 (307f097) into dev (5e47e34) will decrease coverage by 0.05%.
The diff coverage is 45.45%.

@@            Coverage Diff             @@
##              dev    #1425      +/-   ##
==========================================
- Coverage   58.10%   58.05%   -0.06%     
==========================================
  Files         156      159       +3     
  Lines       19657    19745      +88     
  Branches     1854     1867      +13     
==========================================
+ Hits        11422    11462      +40     
- Misses       7673     7720      +47     
- Partials      562      563       +1     

Impacted Files	Coverage Δ
pwndbg/lib/kernel/kconfig.py	34.21% <34.21%> (ø)
pwndbg/commands/kconfig.py	40.90% <40.90%> (ø)
pwndbg/gdblib/kernel/__init__.py	50.00% <50.00%> (ø)
pwndbg/commands/__init__.py	73.15% <75.00%> (+0.05%)	⬆️
pwndbg/gdblib/__init__.py	100.00% <100.00%> (ø)
pwndbg/gdblib/hooks.py	100.00% <100.00%> (ø)

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