* PEP 1, 12: Update outdated references to Docutils to point to Sphinx
* PEP 1, 12: Update and simplify outdated legacy rendering workflow steps
* Readme: Fix minor issues introduced in PR #2399
* Infra: Update contents to include PEP rendering docs and avoid warnings
* Lint: Update hardcoded PEP link checker to detect new PEP URLs
* Check created date exists & matches format, and fix non-conforming
* Automatically fix mixed EoLs on checkin and in one PEP
* Add rst-directive-colons check, fix issue it found and refine regex