When suggesting more performant alternatives to rebuilding `Opacity`, `FadeTransition` is as valid as `AnimatedOpacity`, and it's less obvious ("opacity" versus "fade").

* Adds label attributes

* fix test

* comments

* list equal

* Add SizedBox.square() constructor

* Fix comment and move test case to the right file

* Add missing import statement

This switches the sample analysis code to use package:flutter_lints instead of the flutter repo analysis options, so that they are compatible with a similar change to DartPad.

This reverts commit c75edc26.

* 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>

This reverts commit 8c44abc0.

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?

*  Add IgnorePointer Widget dartpad

*  Fix grammatical issues in docs of IgnorePointer

*  Remove trailing spaces

* 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