flutter_package / fluttertpc_get

* Reformated all sources under lib
* Fixed almost all (now) detected lint and type issues
* Added public api type annotations
* Broke RxSet api (appeared to be a copy from RxList with wrong methods, this needs to be rewrited)
* Broke anyone that relied on **wrong** type annotations that were omitted from this package
* Maybe broke controller close overrides (DisposableInterface from rx core seems to have been always returned a future close method)

fix(docs): fix page argument in GetPageRoute that needs to be a function

added json support to Rx

Closes #558

resolves the value (for native types) or "toJson()" in custom classes.

[docs] more refactor to dependencies docs

Documentation improvements

Só existia na documentação em inglês

fixes for Controller and improvements with extensions and BindingBuilder.

- fixes the onClose(), onInit() async override in GetxController
- added a shortcut `BindingsBuilder.put()` to register a single Controller in a view.
- fixes some doc comments
- added new extensions for `num` and `duration` to apply delayed calls.

Pela nova ortografia, o prefixo extra só possui hífen se preceder
palavra iniciando por "a" ou "h"

Allows you to insert widgets inside a CustomScrollView

trying to fix git file conflicts, and change example app id/name

very often you have to convert the widget to slivers

Manually modify in /example macos, linux, ios, android to use
package_id: com.getx.GetXDemo
name: GetX Demo