Add call to action for getting started

[1j01]

At the bottom of these pages:
https://nim-lang.org/install_windows.html
https://nim-lang.org/install_unix.html

...there's sort of no indication of where to go from there.
At the bottom, there's just the footer.
Scroll back up to the top and there's just Blog Features Install Documentation Forum Donate.

Ideally, a big friendly call to action button at the bottom of those pages that links to a proper Getting Started page, that would be good.

But even if it just said

What next?

Check out the Tutorials section of the Documentation to get started.

that'd be great

(so I'd suggest doing that simple addition before going thru the effort of designing a new page, and maybe reorganizing things, and potentially getting stuck on whatever)

[narimiran]

I think this is a good idea, and two things should be added:

• "What next?" (with link to 'Learn' page: see [RFC] New 'Learn' page #135)
• 'Donate' button