* migrates lib/foundation and lib/widgets

* migrates lib/painting and lib/material

* migrates lib/cupertino, lib/gestures, lib/services, lib/semantics and lib/rendering

* fixes failing tests

* migrates test/

* improves hashing of lists

This reverts commit d056500b.

This reverts commit 31de052e.

This reverts commit e2490f29.

* Adds label attributes

* fix test

* comments

* list equal

* Adds a semantics node flag to identify sliders.

* [fuchsia] Fix roll of engine PR #25167

This changes fixes tests failing due to new isKeyboardKey semantics
flag.

* Fix typo
Co-authored-by: Zachary Anderson <zanderso@users.noreply.github.com>

Update samples to use repo analysis options, Fix sample templates and a ton of analyzer issues (#77868)

* Adds set text semantics action to render editable

* addressing comments

* re-enable test

* fix test

* fix more test

* fix bad merge

* addressing comment

* update dynamic to Object?

This reverts usages of the binding's platformDispatcher to use window again temporarily, because there isn't a TestPlatformDispatcher yet, and so some tests were failing because they mocked the TestWindow to return certain things (locales) that were returning the real values instead of the test values.

Once I've created a TestPlatformDispatcher to allow fake data to be passed to it, we can go back to using the platformDispatcher in all of these places

Remove references to `Window`, and switch usages to `PlatformDispatcher` or `SingletonFlutterWindow` (#69617)

* Remove references to dart:ui.Window, and point usages to PlatformDispatcher or SingletonFlutterWindow, as appropriate

* remove new test platform dispatchers

* Amend documentation

* Fix crash when widgetspan does not produce a semantics node in render paragraph

* fix comments

* fixed corner case, added test, refactored semantics widget

* addressing comment

* Migrate