feat(compression): Add LZW and Arithmetic Coding algorithms

[Microindole]

Description

This PR adds two fundamental lossless compression algorithms to the compression category:

• LZW (Lempel–Ziv–Welch)
• Arithmetic Coding

Both implementations are accompanied by comprehensive JUnit tests to ensure correctness and handle edge cases.

Related Issue

Closes #6798

Checklist

• I have read the contribution guidelines.
• I have tested my code.
• I have followed the code style of the project.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 97.53086% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 77.93%. Comparing base (a7f0bab) to head (30f9570).

Files with missing lines	Patch %	Lines
...om/thealgorithms/compression/ArithmeticCoding.java	95.55%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6799      +/-   ##
============================================
+ Coverage     77.85%   77.93%   +0.07%     
- Complexity     6397     6420      +23     
============================================
  Files           734      736       +2     
  Lines         21363    21444      +81     
  Branches       4185     4198      +13     
============================================
+ Hits          16633    16712      +79     
  Misses         4061     4061              
- Partials        669      671       +2     

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