add docs via mkdocs

[michaelfeil]

this PR adds mkdocs as doc

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 25.00000% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 74.47%. Comparing base (1c5015b) to head (f892092).

Files	Patch %	Lines
...emb/infinity_emb/transformer/quantization/quant.py	25.00%	3 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #137      +/-   ##
==========================================
+ Coverage   74.30%   74.47%   +0.17%     
==========================================
  Files          32       32              
  Lines        1728     1728              
==========================================
+ Hits         1284     1287       +3     
+ Misses        444      441       -3     

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