Add GH Community Guidelines

[agilgur5]

• CONTRIBUTING.md
  • These are a little specific to each repo, but at minimum should have build & test directions.
• pull_request_template.md
  • Can just use ones I've already made a few times
• Issue forms/templates
  • Forms are a new thing! Should make use of the ones I've already made in a few places and remember to use envinfo for Node projects!
• CODE_OF_CONDUCT.md
  • I've meant to write up a custom/specific one that takes inspiration from the Contributor Covenant but is more specific in defining actions to help prevent abusers from gaslighting others about their actions

Some of these I should also extract into a .github repo as the default for my libraries that don't have one