Add `.flutter-plugins-dependencies` to the project, which contains the app's plugin dependency graph (#45379)

No code changes, just comments: I spell-checked all the comments in the repo.

* make BuildContext.{ancestorStateOfType,ancestorRenderObjectOfType,rootAncestorStateOfType} generic

* make BuildContext.inheritFromWidgetOfExactType generic

* make BuildContext.ancestorInheritedElementForWidgetOfExactType generic

* make BuildContext.ancestorWidgetOfExactType generic

* fix snippet

* bump scoped_model on temp version

* update names

* Revert "bump scoped_model on temp version"

This reverts commit d1fcbba028cdb07f44738d1652391692d1ea5ec0.

* address review comments

* fix ci

* address review comments

* repeat the deprecation notice

* fix uppercase

* use of recommanded deprecation syntax

* address review comment

For https://github.com/flutter/flutter/issues/45194
and see also https://github.com/flutter/packages/pull/47.

* Enable asserts

See https://github.com/flutter/flutter/issues/36476

* Remove comment

This reverts commit 99324105.

It was implicated in https://github.com/flutter/flutter/issues/45258

This will catch issues like
https://github.com/flutter/flutter/issues/44252, and this test is
inspired by the `list_demo` sample app in
https://github.com/flutter/flutter/issues/43083#issue-509586473

This is tested locally on a Moto G4 before and after the fix
https://github.com/flutter/engine/pull/13710

The `average_frame_rasterizer_time_millis` of this test drops from
~5.4ms to ~4.9ms after that fix.

* reland add lifecycle enum and fix the scheduleforcedframe

This fixes the sample code analysis to treat dartpad snippets in the same way as snippet snippets, which it wasn't until now (the snippet generator was treating them as "samples"), and some errors crept in. This PR also fixes those errors.

Also, added a --verbose option to the sample analyzer.

I updated the build files for manual_tests, as well as adding in a macos and web directory to allow the manual tests to be run on the web or on desktop.

The main change here are the parts that I added to the files in manual_tests/lib/... (the addition of kIsWeb to "if (!kIsWeb && Platform.isMacOS) {") The rest is just an update of the auto-generated code from flutter create.

* Allow plural localized strings to not specify every case

This reverts commit 75f31079.

This fixes the snippet code output so that it includes the name of the element that it is a snippet for in the first line.

This reverts commit f0794917.

* reland add new enum change (#44281)

This reverts commit ed82bb82.

* Prepare analyze.dart for testing.

* Reorder the file for easier understanding

* Add a test for analyze.dart

* Fix review comments

* Canonicalize locale string for gen_l10n.dart script

* Refresh stocks example to use canonicalized locale

* Sort locales and method/properties/getters alphabetically

* Refresh stocks example to show proper sorting

* Sort Localization generation output

- When creating locales that were assumed from existing locales, the
file that is used is non-deterministic. This adds a sort to the iterator
to ensure that the same existing locale is used to generate the assumed
locale
- When generating material, cupertino and date localizations, the generated getters were not sorted. This
introduces an alphabetic sort

* remove main.dart.snapshot

* Add check for placeholders being an empty map

* Remove unnecessary properties from en_ES.arb in the stocks example

* Use getter instead of methods in the stocks example

* Fixed "annotating types for function expression parameters" lint issue from generated localizations delegate code

* Use raw string for l10n description

* Stock app refresh