Have one core GitHub actions set of files that are called by users's github actions

[cansavvy]

Duh, this was in front of my all along and I didn't think of it.

We could reference a main copy of the OTTR github actions that are here and not require people to make copies! This would make it so people can more easily customize files like "pull-request.yml" and wouldn't have to depend on the sync PRs to update the GHA.

Instead pull-request.yml would just have a series of things like this:

jobs:
  reusable_workflow_job:
    runs-on: ubuntu-latest
    steps:
      - uses: jhudsl/OTTR_Template/.github/workflows/style-code.yml 
```

[cansavvy]

Publishing the github actions would make them even easier to reference: https://docs.github.com/en/actions/creating-actions/publishing-actions-in-github-marketplace

[cansavvy]

I've started a separate repo for this purpose: https://github.com/jhudsl/OTTR_Actions

The idea would be the core github actions are stored here and then called from course's own repositories. This allows for less redundancy and easier for customizing purposes.

[cansavvy]

Step 1: I'm working on setting up a Reusable workflow: https://docs.github.com/en/actions/using-workflows/reusing-workflows here https://github.com/jhudsl/OTTR_Actions/pulls
Step 2: Re-set pull-request.yml to use those github actions from OTTR_Actions
Step 3: Modify documentation where needed.

[cansavvy]

The first half of these actions are on Marketplace: https://github.com/marketplace/actions/ottr-reports Yay!

[cansavvy]

This is done!