Generate documentation for components/data types

[jprochazk]

We currently only generate docs for archetypes into docs/content/reference/data_types (done in #3445). We should also generate docs for:

• Components
• Data types

We should have a single language-specific top-level page for all available components/data types/archetypes.

We should also have links (and backlinks!) between archetypes->components, so that users can easily navigate the documentation.