feat: RFC197

[iorisa]

Features

1. Add LLM pricing plan config.
2. Implement RFC197: https://deepwisdom.feishu.cn/wiki/VyK0wfq56ivuvjklMKJcmHQknGt
3. Add namespace utils
4. Refactor cost calc.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 56.50510% with 341 lines in your changes are missing coverage. Please review.

Project coverage is 80.69%. Comparing base (684ca96) to head (8e85dd3).

Files	Patch %	Lines
metagpt/actions/rebuild_sequence_view.py	30.92%	172 Missing ⚠️
metagpt/actions/rebuild_class_view.py	19.23%	42 Missing ⚠️
metagpt/repo_parser.py	84.39%	32 Missing ⚠️
metagpt/schema.py	45.00%	22 Missing ⚠️
metagpt/utils/graph_repository.py	43.58%	22 Missing ⚠️
metagpt/utils/common.py	51.35%	18 Missing ⚠️
metagpt/roles/engineer.py	0.00%	9 Missing ⚠️
metagpt/memory/brain_memory.py	20.00%	8 Missing ⚠️
metagpt/utils/di_graph_repository.py	36.36%	7 Missing ⚠️
metagpt/document.py	50.00%	3 Missing ⚠️
... and 4 more

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #960      +/-   ##
==========================================
- Coverage   81.85%   80.69%   -1.16%     
==========================================
  Files         226      226              
  Lines       12630    13178     +548     
==========================================
+ Hits        10338    10634     +296     
- Misses       2292     2544     +252     

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[geekan]

lgtm