Add automated block documentation script and workflow

[joeleenk]

This PR adds automated block documentation scripts that can be added to any project to automate AI documentation of blocks.

• Adds an automated documentation script
• Includes per-project json settings file
• Includes a document-blocks.md file with setup steps
• Includes a GH action that can run on all pushes to feature branches OR on PR creation and when a label is applied to a PR. This action will run the documentation script to update docs when changes are made to blocks
• Updates the readme to describe the new workflow

[roborourke]

Think my only question is setting the branches to ignore here, would that be done in the action that calls this step instead?

[joeleenk]

Yeah, we could probably add the branches to ignore as a setting in the ‎.document-blocks.json.example file. I also got some other feedback from Than in my PR where I tried it out on a client project, so I think I have a couple more things to change anyway.