docs: auto generate markdown files

[asanehisa]

This commit adds a new workflow, generate markdown files, which runs api-extractor and api-documenter in order to generate markdown files for all the @public functions in our src code.

There is now a bot that auto runs tests after the generate markdown file workflow and check + update 3rd party notices workflow.

How the bot works:
The bot has write access to the repo, so it is like a regular user committed to the repo, rather than an automated commit. GH prevents automated commits from a workflow, which uses the GITHUB_TOKEN by default, from re-running checks (b/c it might cause an infinite loop of GH actions running), but commits from a workflow with a personal access token will trigger a re-run of tests. so, in a way we're bypassing some of the built-in GH protections, so we have to be careful to only use the bot token in a repo when we know for sure that it won't create an infinite loop of GH workflow triggering.