GHA: Automation of a Repository Activity Digest

### Overview
We need an automation that open source repository managers can install, in order to understand the activity over a defined period (e.g., a week, month, etc.).

### Action Items
- Tasks for Admin staff
- [x] draft a proposal
- [x] ask team members to review
- [ ] add it to the contribution opportunities for members
- Tasks for Members
- [ ] Identify what value you would get from features already defined
- [ ] Identify if there are other things you would like the automation to do
- [ ] Volunteer to build (self assign the issue to yourself)

### Resources/Instructions
- [GitHub Actions](https://github.com/features/actions) supports Node.js, Python, JavaScript, Java, Ruby, PHP, Go, Rust, .NET, and more.

#### History
- @ExperimentsInHonesty
- sourced a potential candidate: https://github.com/abhijeetps/weekly-digest
- tested functionality
- identified that it was not functional
- determined other people had found it to be non-functional since August 2022
- opened issue on the repo (received no response)
- discussed options with team
- drafted this issue to build our own and make it available via the GitHub Actions Marketplace