Move some docs for cli users

[TheLostLambda]

I think we might need to change help.md a little bit? Particularly with some links that aren't just to v2 Exercism stuff. Any ideas what to add @verdammelt ?

Closes #428
Closes #429

[verdammelt]

The old doc pointed at some documents which could be found 'in the side bar'. The new site has those docs in a URL like:

https://exercism.lol/docs/tracks/common-lisp

I'm going to ask Erik over on the linked issue #428 for recommendations on handling those links.

[verdammelt]

Any ideas what to add @verdammelt ?

I suggest pointing people to the Lisp Discord, specifically the beginner-questions and common-lisp channels there. I lurk there and they seem to be generally a friendly and helpful bunch.

(If pointing to beginner-questions I think we should provide guidance to specify that any question is about "Common Lisp" since that channel is for beginners of any "Lisp".)

[verdammelt]

@TheLostLambda I hope you don't mind but I pushed a couple commits with an additional section on where to look for help (but it has a missing link - i know - working on it) and fixing a link to the track documentation page.

If you think they are OK I suggest we merge this (hopefully after i fix the missing link problem - but even without... to keep things moving along.

[verdammelt]

Note: build is failing because key-feature icons are incorrect. This is being corrected by #433.

[TheLostLambda]

Thanks for doing some work on this! Is the Online Communities a replacement for the Discord link you were thinking about? Should we also link to some of the online resources like the spec or PCL?

[verdammelt]

@TheLostLambda the spec & PCL are linked to in our track's guides/resources which is already linked in the document. Perhaps later we can review the docs a bit more and decide which items from the 'awesome list' should be included in the track docs and which should just be a link to the 'awesome list'.