This pull request adds a new script for docs, which generates missingref/**/*.md files. The script can be executed when you runmake build-docs command. The script does not do:

• overwrite the existing ones
• create files for _XXX.py and__init__.py

Note that the title part is generated liketool_context toTool Context.openai_provider will beOpenai Provider, so some of them needs a little manual work to adjust.

The direct need is to addtool_context.md for#1043 but it should be useful for future maintenance.