[WIP] Unify JIT and AOT code paths (#4188)

* WIP

* WIP

* Finish combining JIT and AOT plugins

Still lots of clean up that can be done in some of the more complex ones, but at least it's one file per plugin now.

* Remove unused import

* Fix AOT generation bugs

* Move corePlugins/index.js to corePlugins.js

* Convert JIT files to ESM

* Move tests

* Reorder core plugins to match JIT order

* Update AOT apply tests

* Unify utils

* Combine plugin lists to one single source of truth

* Finish resolving merge conflicts, fix tests

Co-authored-by: Adam Wathan <[email protected]>

Author: RobinMalfait

.eslintignore

@@ -1,4 +1,4 @@
 /lib
 /docs
-/__tests__/fixtures/cli-utils.js
+/tests/fixtures/cli-utils.js
 /stubs/*