…pport

- Add CoordinatorLayoutEntry registry for tracking local listeners
- Implement optimized IsViewContainedIn with early termination
- Add proper nullability markers on all fields
- Update GlobalWindowInsetListener with comprehensive thread safety documentation
- Refactor IME animation handling with helper method
- Remove global listener from MauiAppCompatActivity
- Update ShellContentFragment and ShellSectionRenderer with local listeners
- Update NavigationRootManager with local listener support
- Improve code formatting and comments throughout

Co-authored-by: PureWeen <[email protected]>

- Update ViewHandler.Android.cs to use registry-based approach
- Update ContentViewGroup, LayoutViewGroup, MauiScrollView to use FindListenerForView
- Update SafeAreaExtensions.cs to use new listener pattern
- Update WindowHandler.Android.cs with cleanup comments
- Remove modal-specific listener code from ModalNavigationManager.Android.cs
- Format all changed files according to .editorconfig

Co-authored-by: PureWeen <[email protected]>

- Remove '?' from field declarations in ShellContentFragment and ShellSectionRenderer
- These files have #nullable disable directive so explicit nullable annotations cause errors
- Fields are still properly handled as nullable through null checks

Co-authored-by: PureWeen <[email protected]>

- Change _root from AView to CoordinatorLayout in ShellContentFragment
- Change _rootView from AView to CoordinatorLayout in ShellSectionRenderer
- Remove redundant _managedCoordinatorLayout fields since _root/_rootView are now typed
- GlobalWindowInsetListener registry already tracks the layout-listener pairs
- NavigationRootManager keeps _managedCoordinatorLayout since _rootView can be different types

Co-authored-by: PureWeen <[email protected]>

…egisterParentForChildViews

- Rename GlobalWindowInsetListener class to MauiWindowInsetListener for better clarity
- Rename GlobalWindowInsetListenerExtensions to MauiWindowInsetListenerExtensions
- Update extension methods: TrySetMauiWindowInsetListener, RemoveMauiWindowInsetListener
- Add RegisterParentForChildViews static method to register a parent for child insets without attaching listener to parent
- Update FlyoutViewHandler to use RegisterParentForChildViews instead of instantiating listener
- Update all references across codebase

Co-authored-by: PureWeen <[email protected]>

- Set SafeAreaEdges = SafeAreaEdges.None on childLayout (VerticalStackLayout)
- Set SafeAreaEdges = SafeAreaEdges.None on scrollView (ScrollView)
- Set SafeAreaEdges = SafeAreaEdges.None on parentLayout (Grid)
- This ensures the test is isolated from safe area inset handling changes

Co-authored-by: PureWeen <[email protected]>

Reverted formatting changes (indentation, whitespace) from files that had no functional changes:
- EditTextExtensions.cs
- ViewExtensions.cs
- PickerExtensions.cs
- SearchViewExtensions.cs
- StepperHandlerManager.cs
- MauiPageControl.cs
- MauiSwipeView.cs
- MauiWebView.cs
- IHandleWindowInsets.cs
- ShellToolbarTracker.cs
- ShellFlyoutTemplatedContentRenderer.cs

Kept functional change in SafeAreaExtensions.cs (MauiWindowInsetListener.FindListenerForView) while reverting formatting changes.

This makes the PR focused on functional changes only, with formatting changes deferred to a separate PR.

Co-authored-by: PureWeen <[email protected]>

This reverts commit 534c071.