GitHub Ops Runner with Slack Notifications

## Backup to GitHub 
This workflow will backup all instance workflows to GitHub every 24 hours.

The files are saved into folders using `YYYY/MM/` for the directory path and `ID.json` for the filename.

The Repo Owner, Repo Name and Main folder are set using the **Variables** feature but can be replaced with the `Config` node in the subworkflow. 

The workflow runs calls itself to help reduce memory usage, Once the workflow has completed it will send an optional notification to Slack.

### Time to Run
Tested with 1423 workflows on `1.44.1` it took under 30 minutes for the first run and under 12 minutes once the initial run is complete.