Improving generated documentation project

[tedinski]

Moved from old website TODO list:

• [x] Don't generate "documentation" for grammars that would just be empty and useless
• [x] Re-organize to not nest grammars.
• [x] Improve design and rendering
• [ ] Recognize normal doc comments
• [ ] Add extensive cross-linking
• [ ] Reduce noise in grammars (e.g. DocConfig.sv files)
• [ ] Once generated documentation is good enough, remove old badly formatted 'lib' section

[remexre]

• [ ] render Literate Silver

[krame505]

@602p will open a new up-to-date issue for this and close this one.