GitHub Action #134

I propose that a GitHub Action is created for this repository to make it easy for others to onboard to gather their metrics. Instead of manually writing out a larger workflow file, let's have a GitHub Action created to make it easier for people to collect the metrics.

I'm thinking something akin to the actions/setup-python. Meaning, one can put the following into a workflow...

- uses: flexion/devops-deployment-metrics@v1 
  with:
    time-slice-days: 7
    start-date: 2022-12-01T00:01:00
    owner: CDCgov
    repo: trusted-intermediary
    # etcetera

... and it does the same as what the large workflow above does.