Create a tool for stubs in cstruct v4

[Miauwkeru]

The only thing that does not work as intended yet is the dereference of pointer. As in, it doesn't return the desired type information but just T

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 93.30454% with 31 lines in your changes missing coverage. Please review.

Project coverage is 92.28%. Comparing base (d2f2ee7) to head (cf212f0). Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
dissect/cstruct/tools/stubgen.py	90.15%	13 Missing :warning:
dissect/cstruct/bitbuffer.py	72.72%	3 Missing :warning:
dissect/cstruct/types/base.py	90.90%	3 Missing :warning:
dissect/cstruct/utils.py	70.00%	3 Missing :warning:
dissect/cstruct/compiler.py	87.50%	1 Missing :warning:
dissect/cstruct/cstruct.py	99.17%	1 Missing :warning:
dissect/cstruct/types/char.py	93.75%	1 Missing :warning:
dissect/cstruct/types/enum.py	95.45%	1 Missing :warning:
dissect/cstruct/types/int.py	80.00%	1 Missing :warning:
dissect/cstruct/types/leb128.py	80.00%	1 Missing :warning:
... and 3 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #72      +/-   ##
==========================================
- Coverage   92.33%   92.28%   -0.06%     
==========================================
  Files          20       21       +1     
  Lines        2180     2463     +283     
==========================================
+ Hits         2013     2273     +260     
- Misses        167      190      +23     

Flag	Coverage Δ
unittests	92.28% <93.30%> (-0.06%)	:arrow_down:

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[Miauwkeru]

I added some more tests, and noticed there was still some issues with import stuff from a file. As all signatures/names dissapear once the stub file is there. I attempted to fix this by adding more checks in stubify_file. This seems good enough for now, but I think it might be better to use ast in the future. And maybe look if we can use mypy to generate the stubs with hooks.

[Schamper]

I have made a lot of suggested changes with https://github.com/fox-it/dissect.cstruct/pull/72/commits/7c93f22dd11f51a4e035ee5e84693aa10c34b986