Remove 1745 decorative breaks

* Add missing parameters to SwitchListTile

* Update SwitchListTile doc

* Update doc for existing APIs

* Address comment

* Fix typo

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Co-authored-by: Qun Cheng <quncheng@google.com>

* Add trackOutlineColor for Switch and SwitchListTile

* Update tests

* Update test

* Clean up unnecessary StatefulBUilder in tests

* Fix failed test

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Co-authored-by: Qun Cheng <quncheng@google.com>

* Add Material 3 `SwitchListTile` example and update existing examples

* Update examples with `useMaterial3: true` and update example descriptions.

* add a `ColorScheme` colour

* dart fix --apply

* manual fixes

Move `ListTileTheme` and its tests into separate classes and  add `visualDensity` to the `ListTileTheme` (#100622)

This reverts commit 94ff5202.

This does a cleanup of the examples, removing all of the "section" markers and extra comments that we don't need anymore now that the samples are no longer in the source code. It also removes the --template arguments from the {@tool dartpad} and {@tool sample} directives, since those are no longer used. It converts two examples that I discovered were still embedded into linked examples in the examples folder.

I didn't delete the templates from the snippets config folder yet, because there are still embedded samples in the dart:ui package from the engine that use them. Once dart:ui no longer uses the templates, they can be removed.

I bumped the version of the snippets package to pick up a change that allows removal of the --template argument.

[CheckboxListTile, SwitchListTile, RadioListTile] Adds visualDensity, focusNode and enableFeedback (#89353)

This PR adds visualDensity, focusNode and enableFeedback to:

- CheckboxListTile
- SwitchListTile
- RadioListTile

This extracts the sample code out from the API doc comments, and places them in separate files on disk, allowing running of the examples locally, testing them, and building of slightly larger examples.

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

* migrate material to nullsafety

* address review comments

* address review comments

* fix build

* Fix even more unresolved doc references in material

* ++

* ++

* add language version 2.8 in packages/flutter

* enable non-nullable analyzer flag

Adds an "autofocus" param to ListTile and its Checkbox, Radio and Switch variants, and passes the given value through to the wrapped InkWell, Switch, etc.

This is important for scenarios like a settings screen, where the first interactable element on a page may be a SwitchListTile, for example.

This PR modifies the existing API docs samples to use DartPad so that all of the samples are now interactive apps on the API docs site.

It also removes the restriction for the max width of the description area so that the dartpad region can expand horizontally.

I updated the first paragraph on the API docs to indicate that Flutter is more than just mobile now (same text as the README.md at the top level).

I modified a few of the examples so that they looked nicer, and fit better on the page.

I added the sample description text above each DartPad instance, since that often defines the context of the example.

I removed animations and images when they were redundant with the sample content. There were a few that made sense to keep, so I did.