Deprecate EventEmitter

[JsantosDK]

Current behavior

The library utilizes EventEmitter to emit changes to the selected language.

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Expected behavior

The library should rely on a Subject instead, given that these are the most adequate to the use case.

What is the motivation / use case for changing the behavior?

The EventEmitter is made to be utilized with components and directives, as per original angular team instruction.
Furthermore, with the start of moving from @Output/ @Input decorators to signals, output/ input respectively, the usage of the EventEmitter seems inadequate and possible to causes issues due to lack of support in the future.

How do you think we should implement this?

Migrate the onLangChange, onDefaultLangChange and the onTranslationChange from an EventEmitterto a Subject.

I'm ok with forking the repo and doing the changes myself, however, I would like confirmation that is ok before putting work into it.

[CodeAndWeb]

I am fine with changing this - however have not the time to work in it myself right now.
If you can invest the time, it would be great!

[JsantosDK]

Sorry for the delay, I opened #1517 with the changes needed.