[Feature Request]: Expose page traffic and PR review metrics for the Beam community

### What would you like to happen?

Between GitHub actions and APIs, there's some good community metrics out there that we don't yet expose in a super useful way to the community. A couple examples:

1. With a GitHub action, I was able to generate a PR summary on https://github.com/damccorm/playground/pull/29 (using my fork of the main https://github.com/flowwer-dev/pull-request-stats action - https://github.com/damccorm/playground/blob/main/.github/workflows/pr-stats.yml with a fix patched in). Unfortunately, that doesn't yet support exporting the summary direct to email, so we'd need to add that or figure out a different way to integrate stats
2. GitHub insights provides a dashboard on page traffic - https://github.com/apache/beam/graphs/traffic

Non-committers can't see this though. We could expose it using GitHub's rest api - https://docs.github.com/en/rest/metrics/traffic?apiVersion=2022-11-28 - or using something like https://github.com/marketplace/actions/repository-traffic (not sure how well it works yet).

It would be awesome if we sent an email to the devlist on some frequency (maybe 30 days) highlighting these stats.

### Issue Priority

Priority: 2 (default / most feature requests should be filed as P2)

### Issue Components

- [ ] Component: Python SDK
- [ ] Component: Java SDK
- [ ] Component: Go SDK
- [ ] Component: Typescript SDK
- [ ] Component: IO connector
- [ ] Component: Beam examples
- [ ] Component: Beam playground
- [ ] Component: Beam katas
- [ ] Component: Website
- [ ] Component: Spark Runner
- [ ] Component: Flink Runner
- [ ] Component: Samza Runner
- [ ] Component: Twister2 Runner
- [ ] Component: Hazelcast Jet Runner
- [ ] Component: Google Cloud Dataflow Runner