[TRY] Optimization Detective debug helper

[swissspidy]

Summary

Fixes #1736

Idea: add a "dot" on relevant elements (e.g. LCP elements). Click on the dot to learn more about the element.

Relevant technical choices

• Allows loading web-vitals attribution build

[swissspidy]

With fresh eyes I was able to fix the anchor positioning and styling a bit. This looks much better now:

Screen.Recording.2025-01-10.at.15.42.34.mov

Of course it needs a lot of tidying up still, but it seems to more or less work.

Now we just need to figure out where to put all of this code. don't necessarily like putting it into its own GitHub repo where it's not easily discoverable.

---

Aside:

There is one test failure now:

1) Test_OD_URL_Metric::test_get_json_schema
root/inpData
Failed asserting that false is true.

🤔