Document programming features

[FireChickenProductivity]

It was agreed in a community backlog session that the community commands for writing computer code has become difficult for new users to learn. I agreed to work on addressing this.

I want to discuss:

• snippets
• code formatters
• operators
• common functions
• pair commands (round, box, curly)
• cursorless (by linking to cursorless documentation and providing a brief description)
• keywords (though expanding keyword support is in progress)
• some useful language specific things
• how to discover useful features for your language from the community files (including how to understand the directory structure and find functionality based on the tags a language activates)