feat: +git tools

[iorisa]

Features

• Add git tool lib

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 23.52941% with 104 lines in your changes are missing coverage. Please review.

Project coverage is 36.40%. Comparing base (933a242) to head (56e19bc).

Files	Patch %	Lines
metagpt/utils/repo_to_markdown.py	12.76%	41 Missing :warning:
metagpt/utils/common.py	8.33%	22 Missing :warning:
metagpt/utils/git_repository.py	24.13%	22 Missing :warning:
metagpt/tools/libs/shell.py	41.17%	10 Missing :warning:
metagpt/tools/libs/git.py	53.84%	6 Missing :warning:
metagpt/utils/tree.py	50.00%	3 Missing :warning:

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Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1068       +/-   ##
===========================================
- Coverage   81.35%   36.40%   -44.95%     
===========================================
  Files         248      250        +2     
  Lines       13883    13984      +101     
===========================================
- Hits        11294     5091     -6203     
- Misses       2589     8893     +6304     

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