[QUEST] Internals should prefer generic array methods over prototype_extensions

[Serabe]

This supersedes #10899 that is stale.

• addArrayObserver
• removeArrayObserver
• objectAt
• replace
• remoteAt
• insertAt Prefer generic insertAt over prototype_extensions #16048
• pushObject
• pushObjects
• re-org public api
• etc ...
• docs
• all the tests

The goal here is merely to decouple the internals from the the observable based prototype extensions.
This will hopefully give us the flexibility to make a future call re: prototype extensions in general. This also eases the pain of using ember with prototype extensions disabled.

All this is accomplished without breaking semver in anyway.

More todo:

• Merge Enumerable + NativeArray
• Merge MutableEnumerable + MutableArray
• Deprecate Enumerable as [bugfix release]
• Deprecate MutableEnumerable as [bugfix release]

[alvincrespo]

@Serabe How can I help? This is my first time diving into Ember internals.

[Serabe]

This might be closed as per #16048 (comment)

[Serabe]

Removing labels to avoid people working on this until there is some clarification on the goal.

[Serabe]

@mmun any update on this?

Thank you!

[mmun]

As far as internal refactors go, you should follow https://github.com/emberjs/rfcs/blob/array-functions/text/0323-array-functions.md#detailed-design.

[pixelhandler]

@Serabe is this still an issue. Is there anything that remains TODO?