Auto-generate a "Language Support" page like slang's for each tool

[mithro]

slang has an excellent "Language Support" page @ https://sv-lang.com/language-support.html.

It would be awesome if we generated a similar looking page for each of the tools in sv-tests.

[hzeller]

I could imagine grouping the language features with another tag (each test can have an arbitrary number of tags), so that we can slice and dice the output according to that.