Updated macro system

[ef4]

This is bringing @embroider/macros up to date with RFC 507.

Here's a table to track progress.

• "implemented macro" means that the build-time implementation is done and matches the RFC. Some of the unchecked ones may have implementations but need review to compare against the latest RFC
• "implemented types & runtime" means that the run-time implementation is done and matches the RFC. This also provides the typescript types that users of the macros will see.
• "documented" means it's documented in this package's README. Some of the unchecked ones may already be documented but need another review pass to ensure they match the latest.

name	type	implemented macro	implemented types & runtime	documented
dependencySatisfies	js	✔️
	hbs
each	js	✔️
	hbs
failBuild	js	✔️
	hbs
getConfig	js	✔️
	hbs
getOwnConfig	js	✔️
	hbs
importSync	js	✔️
	hbs
macroCondition	js	✔️
	hbs
moduleExists	js	✔️
	hbs
maybeAttrs	js	not applicable	not applicable	not applicable
	hbs

[simonihmig]

@ef4 any ETA for this?

Sorry for being impatient here :) But we are just closing down on a major refactoring of ember-bootstrap's build system, from having separate trees and broccoli magic to (eventually build-time) helpers (context: ember-bootstrap/ember-bootstrap#984). The initial plan was to provide our own AST transforms (much narrower scope). But having learned that these macros here also work for classic ember-cli addons, it makes these a perfect fit, and certainly a better choice than to reinvent the wheel.

However I wouldn't want to be blocked for too long, that's why I'm asking! :)

Just from a quick look it seems that the glimmer transforms are not updated yet, right?

Maybe I can help bring this over the finish line! Could you provide me a gist of what's still missing, with any context that I might need?

[ef4]

Merging this because there's no need to a long-lived branch. I'll copy the remaining todo into a separate issue.