feat: add code detect fasttext model

[yogacc33]

Modification

Add fasttext code model to detect code in content.

[codecov]

Codecov Report

Attention: Patch coverage is 83.67347% with 8 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
llm_web_kit/model/code_detector.py	83.67%	8 Missing ⚠️

@@            Coverage Diff             @@
##              dev     #483      +/-   ##
==========================================
+ Coverage   89.97%   90.57%   +0.60%     
==========================================
  Files         107      102       -5     
  Lines        8288     8508     +220     
==========================================
+ Hits         7457     7706     +249     
+ Misses        831      802      -29     

Files with missing lines	Coverage Δ
llm_web_kit/model/code_detector.py	87.30% <83.67%> (+35.49%)	⬆️

... and 11 files with indirect coverage changes

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