Add two's complement implementation

[AliAlimohammadi]

Description

This PR adds a two's complement implementation to the bit manipulation module.

Type of change

• New algorithm implementation

Changes

• Added twos_complement.rs with comprehensive documentation
• Includes 12 test cases covering edge cases and error handling
• Follows Rust best practices and TheAlgorithms conventions

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[AliAlimohammadi]

@siriak, this is ready to be merged.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.66%. Comparing base (00cbbb9) to head (0ad36a2).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #968      +/-   ##
==========================================
+ Coverage   95.61%   95.66%   +0.05%     
==========================================
  Files         341      342       +1     
  Lines       22273    22330      +57     
==========================================
+ Hits        21296    21362      +66     
+ Misses        977      968       -9     

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[siriak]

Looks good, thanks!