less: add more information link

[navarroaxel]

• The page (if new), does not already exist in the repo.
• The page is in the correct platform directory (common/, linux/, etc.)
• The page has 8 or fewer examples.
• The PR title conforms to the recommended templates.
• The page follows the content guidelines.
• The page description includes a link to documentation or a homepage (if applicable).

I think we should use the official website because is header to find the a link to a man page.
Another option is the official repo: https://github.com/gwsw/less.

For #5510

[marchersimon]

Should we remove slashes at the end or leave them? IMO, it looks better without.

[navarroaxel]

I prefer to avoid the redirection just by 1 slash, but there are redirects in the tldr links

[bl-ue]

A discussion is in order on when and how much to simplify links; it's been bugging me a lot.