Feature docs

[shenchucheng]

Features

• write docstring by LLM
• move information, such as 'Author', from the docstring to module-level comments in the file using the # symbol
• fix intermittent UT errors of the web browser engine caused by network issues

[codecov-commenter]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (06d7269) 81.19% compared to head (4642efd) 81.01%.

Files	Patch %	Lines
metagpt/tools/web_browser_engine_selenium.py	0.00%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #920      +/-   ##
==========================================
- Coverage   81.19%   81.01%   -0.19%     
==========================================
  Files         226      223       -3     
  Lines       12477    12332     -145     
==========================================
- Hits        10131     9991     -140     
+ Misses       2346     2341       -5     

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