Reduce barrier of entry for translation

[moritztim]

Your Godot version:
n/a
Issue description:
I found a mistake in a page translation and wanted to fix it. After clicking multiple links I finally got to weblate which was hella confusing and I gave up (I did post it in the relevant channel at chat.godotengine.org).
If you're on an english page you get this handy "Edit on GitHub" button:

An equivalent of that for the translated pages would be great, instead of "View page source"

URL to the documentation page (if already existing):
n/a

[AThousandShips]

I'm not sure how the underlying read-the-docs system works, but I suspect this is a result of how it is made up, rather than an oversight, simply that the interface is built to one setup, so unsure if there's a direct way to add the correct links in a simple way to the pages themselves

[tetrapod00]

I don't think weblate has the concept of source pages, only source strings, so we probably can't link directly to the weblate for a particular page. But we probably could change one of these two links to point to the translation contributing page instead, which would reduce friction.