"CodeQL for X" docs: update "Further reading" sections

[jf205]

Partially fixes https://github.com/github/semmle-docs/issues/68.

This updates the "Further reading" sections for the "CodeQL for X" topics to follow the GitHub style. Detail in the above issue. Other sections of the docs will be dealt with in separate PRs. This is dull--apologies to the reviewer.

Change	Preview	Source	Comment
Add reusable for links to CodeQL tools and QL language ref	n/a	source	The CodeQL tools article will go live when we update the docs for the next CodeQL release.
Add reusables for language-specific pages	n/a	sources
Remove "Further reading" sections from "CodeQL for X" map topics	e.g. CodeQL for C and C++	source	See current version on help.semmmle.com
Refactor further reading sections in CodeQL for X tutorials	C and C++ example, C# example, Go example, Java example, JavaScript example, Python example	sources	See current versions on help.semmle.com: example

[hubwriter]

This seems fine except for the "CodeQL tools" link
https://help.semmle.com/codeql/codeql-tools.html
This gives me a page not found.

Cosmetic: the spacing is a little odd in these lists, but I realise this is just a stepping stone to getting this documentation into GitHub.

[jf205]

Thanks @hubwriter.

Cosmetic: the spacing is a little odd in these lists, but I realise this is just a stepping stone to getting this documentation into GitHub.

Yeah. That's annoying. It's an artifact from having some of the list items in a reusable. Could easily be solved with some CSS tweaking, but it's not a priority, as you say.

This seems fine except for the "CodeQL tools" link
https://help.semmle.com/codeql/codeql-tools.html
This gives me a page not found.

Yep. See the comment in the OP. That page will go 'live' tomorrow evening. The updates in this PR are for 1.24, so we'll have plenty of time to test those links.

[jf205]

@hubwriter: i think this can probably be approved. Over to you.

[shati-patel]

This seems fine except for the "CodeQL tools" link
https://help.semmle.com/codeql/codeql-tools.html
This gives me a page not found.

Yep. See the comment in the OP. That page will go 'live' tomorrow evening. The updates in this PR are for 1.24, so we'll have plenty of time to test those links.

FYI, that page is now live! (The release/publication got pushed forward a bit.)