Integrate the compiler branch with the new dependency tracker

#2199 made substantial changes to the API templates, most notably the introduction of the 'ʷ' method variants, and the new `RefID` field.

The compiler branch moves all the API types over to be cgo wrappers, which makes the introduction of `RefID`s difficult.

The compiler branch has stubbed out the dependency tracker logic, and these have to be remerged.

This could be done in the templates (if we can figure out where to store the `RefID` data), or done by reimplementing the tracker as a compiler plugin.