* Add support for M3 AppBar 'Medium' and 'Large' types.

* Updates from review feedback.

* Updated from review feedback.

`VisualStudio` calls `vswhere.exe` to find Visual Studio installations and determine if they satisfy Flutter's requirements. Previously, `VisualStudio` stored the JSON output from `vswhere.exe` as `Map`s, resulting in duplicated logic to read the JSON output (once to validate values, second to expose values). Also, `VisualStudio` stored two copies of the JSON output (the latest valid installation as well as the latest VS installation).

This change simplifies `VisualStudio` by introducing a new `VswhereDetails`. This type contains the logic to read `vswhere.exe`'s JSON output, and, understand whether an installation is usable by Flutter. In the future, this `VswhereDetails` type will be used to make Flutter doctor resilient to bad UTF-8 output from `vswhere.exe`.

Part of https://github.com/flutter/flutter/issues/102451.

* Add ignore_flakiness property to staging builds.

Bug:104100

* Update .ci.yaml

Co-authored-by: Bruno Leroux <bruno.leroux@gmail.com>

* Add tests

* fix tests

* updates
Co-authored-by: Renzo Olivares <roliv@google.com>

Add ability for `ModalRoutes` to ignore pointers during transitions and do so on `Cupertino` routes (#95757)