Update pull request templates and implement rulesets on the main branch

[ksterne]

Documentation

To capture some things that were discussed during the DAWG meeting today, we've got pull request templates (the issue ones seem to be working) in the ~/.github/ directory, but these don't seem to be populating. Github has ways to protect the main branch with rulesets as well.

Purpose

• update
• new
• remove
• typo/grammar change
• formatting improvement

Category

• code documentation
• wiki
• README
• installation guide
  • OS specifics
  • dependency
• data products information
• tutorials
  • plotting
  • io
  • data products
• examples
• citing/licensing
• troubleshooting
  • installation
  • tutorials
• history
• guidelines
  • developer
  • communication
  • release

Details

Similar to #641, it seems as though there issue templates that are being populated, but there are not ones for pull requests. Having pull request templates will help new developers/contributors to making a good pull request from the start. There are templates in ~/.github/PULL_REQUEST_TEMPLATE/ but these haven't been updated in 3 to 5 years, so maybe there is something that needs to be changed for Github to recognize them whenever someone makes a pull request.

Related to this, some of the admins for the rst repo should be able to implement some rules to prevent merging into main under the "Settings/Rules/Ruleset" options. Github has some documentation on rulesets.