Generate and publish Moore documentation in the CI

It's likely that Moore will remain a pure Python project. In principle, we can then generate some nice Read-the-Docs-style web pages for the various modules, which can automatically link to any referenced C++ algorithms and tools (cf. this discussion).

Either way, it would be fantastic to auto-generate and publish Stripping-style selection pages for HLT1 and HLT2. We can include control and data flow graphs for each line as well.

The tricky part here is getting access to the rest of the stack in the CI.