flutter_package / fluttertpc_get

- Added `Get.delete( force)` which was missing to manually remove permanent instances with Get.put().
- added missing doc comment to isPrepared()

subtle Rx improvements and docs.

Co-authored-by: Nipodemos <nipodemos13@gmail.com>

- small comment fix (https://github.com/jonataslaw/getx/pull/560#commitcomment-42045326)
- added `RxBool.toggle()`as an easy shortcut for switching true/false values.
- added `_RxImp.nil()` to easily set the value to `null` (`nil` comes from LISP :P) seems to be a useful sometimes, for instance if using `RxString` in `TextField.decoration.errorText` is the only way to avoid the "error state".
- adds missing docs to Rx classes.

rx list sort method compare param passed

This reverts commit 878bfe51.

This reverts commit aa7fb11d.

dialog style

improve docs, cleanup workers, added samples, fixed rx operators

fix(lint/analyser): Added analyser + effective dart

- fixes #465
- iOS has an exception to the rule, when no Curve is defined, it doesn't use linearTransition in `CupertinoPages` (`Transition.cupertino/native/default`) and fullscreen dialogs so it applies the Curve, or use the default one.
It might be smarter, maybe, to also enforce the `animation` duration to stay in platforms defaults.
- had to change `CupertinoTransitions.buildTransitions` params in order to make the check and keep the code change small.

- `Changed HashMap<int,GetStateUpdate>` to `HashSet<GetStateUpdate>`.
 Reference https://github.com/jonataslaw/getx/pull/565#discussion_r484088390
-  Added a internal VoidCallback in `GetStateUpdaterMixin::getUpdate`, to see if it reduces overhead of anonym function in `setState()` (considering GC).

- renamed and added defaults transition duration and types in "GetInterfase"
- added missing parameters in `Get.to` / `Get.offAll`,  fixes #570
- added optional `transitionDuration` and `transitionCurve` to `Get.dialog()`

- improved code docs for `BindingsBuilder` clarifying the issue with fat arrows and Get.put()
- major change in `GetxController`, `GetBuilder`, `SimpleBuilder` to improve docs, code cleanup (left a "clean" mess with the previous code to revert if needed)
- new `GetStateUpdaterMixin` and `GetStateUpdate` in favour of `StateSetter` (big change).
- Fixes issue #507, quick code for testing multiple GetBuilder ids can be found here: https://gist.github.com/roipeker/f34654ca35b80f5bf34736bd865f6358.
Warning: is a big change, but I did my tests and seems to be working fine. Please, test performance and potential bugs.

* 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