Badge request: "Used by (count)" for GitHub Actions

[Cyberbeni]

📋 Description

This badge should show how many other repositories use a given GitHub Action for their workflows.

🔗 Data

Implementation by EndBug: https://github.com/EndBug/api/blob/master/api/github-actions/used-by.ts
Example usage with also useful click action: https://github.com/EndBug/add-and-commit/blob/0c4298a18d3a9d33e3b879c7b73b4a457547d949/README.md

🎤 Motivation

It would give a better measurement about usage than stars do.

[chris48s]

This mechanism of performing a free text search for the action name seems a bit crude, especially as GH's text search ignores the / character and views them as 2 strings. I suspect "EndBug add-and-commit" is sufficiently obscure not to raise false positives, but I can see other action names generating some false-positives.
While I probably wouldn't want to frame this as "here's how many people are using your GH action", maybe this concept has legs as a more general search results badge?

[calebcartwright]

Ironically we were just discussing this (#4559 (comment))

maybe this concept has legs as a more general search results badge?

I could certainly see that as well