Finalized code to block conversion

[ebeetles]

This is the final version of code to block conversion in the JSeditor. Changes include:

• Added all blocks supported by block to code conversion for the reverse conversion
• Added associated unit tests for all supported blocks
• Added complete and detailed documentation for how to add a new block for support
• Added script to minify JSON file for code to block conversion

[github-actions]

✅ All Jest tests passed! This PR is ready to merge.

[walterbender]

I am getting an error when I try to convert back to blocks:

[walterbender]

It is fine when running from local server.