feat: Introduce AWA2 benchmarks & update docs

[dilyabareeva]

• Update readme and doc files to reflect the current status of the library
• Remove outdated files
• Fix various bugs
• Introduce AWA2 + Resnet-50 benchmark
• Refactoring: split BenchConfigParser into submodules, improve quanda init

[codecov]

Codecov Report

❌ Patch coverage is 96.25468% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 95.18%. Comparing base (4d4041f) to head (3495079).
⚠️ Report is 55 commits behind head on main.

Files with missing lines	Patch %	Lines
quanda/benchmarks/config_parser.py	95.45%	3 Missing ⚠️
quanda/metrics/base.py	84.21%	3 Missing ⚠️
quanda/benchmarks/base.py	93.54%	2 Missing ⚠️
quanda/metrics/ground_truth/linear_datamodeling.py	88.88%	1 Missing ⚠️
quanda/metrics/heuristics/model_randomization.py	85.71%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #285      +/-   ##
==========================================
+ Coverage   94.95%   95.18%   +0.23%     
==========================================
  Files          71       71              
  Lines        3625     3740     +115     
==========================================
+ Hits         3442     3560     +118     
+ Misses        183      180       -3     

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