This reverts commit d9882263.

Adds the basic framework for the mouse cursor system. 

* Adds MouseRegion.cursor
* Adds SystemMouseCursors
* Adds mouseCursor to some widgets

* Wireup autofocus for OutlineButton

Fixes #56493

* add test

Unrevert of paste button hides when nothing to paste

ada8a0fd6 Roll src/third_party/skia 83c6626946d0..21be4f215d0b (5 commits) (flutter/engine#18275) (#56932)

When `const LocalPlatform` is used immediately and not passed as a
dependency it does not have utility over the static properties from
`dart:io`. Remove these uses to reduce the noise around how the
instantiable `Platform` class is used.

* 9ea2db5ba Add FlMessageCodec, FlBinaryCodec, FlStringCodec (flutter/engine#18186)

* f42275775 Roll src/fuchsia/sdk/linux from MhpFP... to c1q_S... (flutter/engine#18222)

* 2ab918c18 Roll src/third_party/skia a14084ba1b41..8f6c3ed7c7be (1 commits) (flutter/engine#18223)

* 40167b68e Make robolectric tests run against SDK 29 by default (flutter/engine#17996)

* e5b0db6b0 Roll src/third_party/skia 8f6c3ed7c7be..b55372444d1b (4 commits) (flutter/engine#18224)

* ed08c3e2a Roll src/fuchsia/sdk/mac from 4MCVP... to T5tT0... (flutter/engine#18228)

* 67675173b Roll src/third_party/skia b55372444d1b..ac09f7cd7a28 (2 commits) (flutter/engine#18229)

* 983de2c40 Remove pipeline in favor of layer tree holder (flutter/engine#17688)

* a1218dd3c Roll src/third_party/skia ac09f7cd7a28..c683912173bb (2 commits) (flutter/engine#18230)

* 68bf13763 skip painting clipped out pictures (flutter/engine#18204)

* 703525502 make compiler worker count configurable (flutter/engine#17616)

* c8ff03cac Publish validation layer deps as part of the fuchsia artifacts (flutter/engine#18214)

* 576f0e1f9 Roll src/third_party/skia c683912173bb..7359165e660c (1 commits) (flutter/engine#18234)

* 1b3b4ec88 skip font loading tests for safari (flutter/engine#18232)

* 9319d7c26 Roll src/third_party/skia 7359165e660c..6913d1bb1d7a (1 commits) (flutter/engine#18237)

* 1b56f35d4 Roll src/third_party/dart 617bc54b715d..2a14a62112e6 (30 commits) (flutter/engine#18239)

* ff6942f57 Add fontFeatures and decorationThickness to textstyle (flutter/engine#18235)

* 4418ce882 Revert "Remove pipeline in favor of layer tree holder (#17688)" (flutter/engine#18242)

* 9d8daf238 Roll src/third_party/skia 6913d1bb1d7a..bf1904fd4898 (3 commits) (flutter/engine#18243)

* Updated bin/internal/fuchsia-linux.version

* Updated bin/internal/fuchsia-mac.version

This reverts commit d5634982.

This reverts commit f865ac7e.

The default for build for flutter build ios should be release to match the other build commands. This is correctly handled in the command, but the documentation is incorrect. Update the documentation and the default to reflect the more common case of building for a physical device.

* Expose includeSemantics option to RawKeyboardListener

* Revert "Expose includeSemantics option to RawKeyboardListener"

This reverts commit 684edccfb0bacb358285b34b7a6dafd45a070ca7.

* Set includeSemantics to false

* Expose includeSemantics for RawKeyboardListener

* Add test

The test has been consistently green for the last few commits.

Unreverts #54902 with fixes for a failing integration test.

Avoid calling `builder` in `ConstrainedLayoutBuilder` when layout constraints are the same.

[Design doc](flutter.dev/go/layout-builder-optimization).

## Related Issues

Fixes https://github.com/flutter/flutter/issues/6469

* [flutter_tools] integration l10n tool

* add runtime skip to build system

* Update build_system.dart

* add links to issues, comments

* Update packages/flutter_tools/test/general.shard/build_system/build_system_test.dart
Co-authored-by: Shi-Hao Hong <shihaohong@google.com>

* Update packages/flutter_tools/lib/src/build_system/targets/localizations.dart
Co-authored-by: Shi-Hao Hong <shihaohong@google.com>

* Update localizations.dart

* switch to gen_l10n localizations

* fix tests
Co-authored-by: Shi-Hao Hong <shihaohong@google.com>

This engine version contains the Dart SDK that has been unforked for the
null-safety feature.

9b905d3f0 Manual roll of Dart 617bc54b71...39e0e75fcf (#18215)