Package to obtain the style of the TikZ/PGF-Documentation

The gold standard of LaTeX-documentation is – at least for me – the TikZ/PGF-documentation. It is formatted consistently, has great code highlighting and (one of the best features in my opinion) you can click on any command in code-snippets and get to the corresponding chapter with it’s explanation.

How can I obtain the same look and functionality?

I had a look at the source of the doc, but it was quite overwhelming. Most of the macros seem to be defined in pgfmanual-en-macros.tex, is this correct? Or is it also based on a special package?

The package tcolorbox has the additional library documentation, which supports the typesetting and indexing of the explanations for commands, environments, keys … and the simultaneous printing of the source code and the compiled result. But it does not seem to provide the functionality of "clickable" code snippets.