Frontend Integration for "Missing One Implementation" Counts

[jcscottiii]

Fetch "Missing One Implementation" counts from the backend API.

Handle pagination to load and display data in chunks.

Display the data using Google Charts.

Create an intuitive and interactive user interface for selecting the browser and viewing the charts.

Need a way to have this be activated behind some flag

[KyleJu]

Just chatted with James offline about the progress so far. He is currently optimizing backend APIs for this, but I can work on the following meanwhile:

1. Adding the chart to the stats page
2. Having this behind a flag. (we don't have anything as advanced as wpt.fyi for feature flags)
3. Making the API calls to get the data (this is the part James is optimizing now).

I will get started on the items above as draft PRs, as James works on the backend.

cc @past