Upgrade Gnome in website and documentation

[carlavilla]

Summary

Upgrade Gnome sidenav
Upgrade Gnome install instructions in website and documentation
Remove Gnome stale documentation

We also need to upgrade the contact section.

Based on: 262873

[bapt]

documentation/content/en/books/handbook/x11/_index.adoc

1027 ↗

(On Diff #107341)

why appending the version, it makes no sense and you would have to update it each time.

[carlavilla]

Point to gnome instead of gnome-42

[carlavilla]

Fixed! Thanks @bapt

[ygy]

website/content/en/gnome/_index.adoc

46

Deleting the bug reporting link here seems to left the whole "but sometimes things simply go wrong" hanging. Maybe restore the link, or get rid of the "sometimes" part?

[grahamperrin]

website/content/en/gnome/_index.adoc

16

was (past tense, because grew into is past tense)

37–38

Superflous, compared with e.g. https://www.freshports.org/x11/gnome/#add.

46

Personally, I'd delete the entire sentence.

[carlavilla]

Fixed all the problems

[carlavilla]

Since I fixed all the problems. I'm gonna commit this change.
We can improve it later with another commits.

[carlavilla]

I forgot to add the phabricator link in the commit

[grahamperrin]

Thank you.

In D35587#812957, @carlavilla wrote:

… We can improve it later with another commits.

Yep, towards this:

• https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253746#c10 for the bug(s) affecting GNOME on AMD that can be entirely show-stopping, from the outset, if not worked around
• https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=265225 for screenshots.