* docs: standardize Context class documentation formatting
- Unified all method docstrings to standard format
- Fixed mixed language and formatting issues
- Added complete parameter and return descriptions
- Enhanced developer experience for plugin creators
- Fixes#4429
* docs: fix Context class documentation issues per review
- Restored Sphinx directives for versionadded notes
- Fixed MessageSesion typo to MessageSession throughout file
- Added clarification for kwargs propagation in tool_loop_agent
- Unified deprecation marker format
- Fixes#4429
* Convert developer API comments to English
* chore: revise comments
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Co-authored-by: Soulter <37870767+Soulter@users.noreply.github.com>