Store download metrics + show most downloaded on home page

[lucacasonato]

We already collect this information in GCP logs - we now need to aggregate & store it somewhere so we can display it.

[olets]

Requests for surfacing download metrics on package pages have been closed as duplicates of this:

• Add analytics or other download numbers #343
• [feature request] usage analytics of packages for authors #383
• edited to add ux: can you show download info like npmjs.com #731

But this issue's title explicitly limits metrics' surfacing to showing on "the homepage", which given the "most downloaded" limit I take to mean the https://jsr.io/ homepage. Can we get an official comment on whether this issue includes support for surfacing download metrics on package pages?

[felipezarco]

I believe this issue is important, specially in the package page (pointed out as not included by @olets).

The number of weekly downloads on npm is a significant indicator of a package's credibility, particularly for developers who are in a hurry. It frequently becomes a decisive factor in determining whether they will choose the package.

I am sure JSR will want that in order to overtake npm, if not now, in the future.

[cloydlau]

Now we already have Version Badge, JSR Score Badge and Scope Badge, it would be awesome to add Downloads (total/monthly/weekly) Badge! ❤️