Migrates `manual_api_docs` to `rules_js`. Since compiler CLI is ESM
compiled but doesn't have extensions, we can either bundle or simply use
the dependency as type only. This is easier and sufficient for this
use-case.
PR Close#61181
Adds build rules for "artificially" generating `DocEntry` collections for block and element APIs. The two rules are very similar, but _just_ different enough that it's worth having two separate implementations.
PR Close#52480
