Address PR feedback: refine XAML source generation documentation (#3079)

* Initial plan

* Address PR feedback: update XAML source generation docs

- Changed "preview" to "opt-in" in IMPORTANT notes
- Reordered content to promote global setting first
- Added fine-grained control section with clear context
- Fixed markdown formatting (missing > characters in runtime-load.md)

Co-authored-by: jfversluis <939291+jfversluis@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: jfversluis <939291+jfversluis@users.noreply.github.com>

Author: Copilot

docs/xaml/fundamentals/get-started.md

@@ -83,28 +83,28 @@ The following example shows a <xref:Microsoft.Maui.Controls.ContentPage> contain
 ## XAML Source Generation
 
 > [!IMPORTANT]
-> This feature is in preview. To try it, opt-in by setting the XAML inflator in your project file as per the instructions below. Behavior and defaults may change. Please let us know your experience with this (good or bad) in the .NET MAUI repository.
+> This feature is opt-in. To use it, set the XAML inflator in your project file as per the instructions below. Please let us know your experience with this (good or bad) in the .NET MAUI repository.
 
 You have the option as of .NET 10 to have XAML generate C# instead of IL (intermediate language) by using Roslyn source generation. This improves your ability to debug XAML by emitting the source files and setting break points in them directly, speeds up the debug performance of page rendering, and improves your app behavior consistency between debug and release build modes.
 
-To enable XAML source generation for all XAML files in the project, add this to your project file.
+To enable XAML source generation for the whole project, add this to your project file:
 
 ```xml
-<ItemGroup>
-    <MauiXaml Update="**/*.xaml" Inflator="SourceGen" />
-</ItemGroup>
+<PropertyGroup>
+   <MauiXamlInflator>SourceGen</MauiXamlInflator>
+</PropertyGroup>
 ```
 
-Similarly, you can include or exclude certain XAML files by configuring the pattern in the `Inflator` attribute.
-
-To enable XAML source generation for the whole project, you can add this.
+For more fine-grained control over what XAML files use XAML Source Generation, you can configure individual files or patterns:
 
 ```xml
-<PropertyGroup>
-   <MauiXamlInflator>SourceGen</MauiXamlInflator>
-</PropertyGroup>
+<ItemGroup>
+    <MauiXaml Update="**/*.xaml" Inflator="SourceGen" />
+</ItemGroup>
 ```
 
+You can include or exclude certain XAML files by configuring the pattern in the `Inflator` attribute.
+
 Reference the [source generator configuration documentation](/dotnet/core/extensions/configuration-generator) for using options like `EmitCompilerGeneratedFiles`.
 
 ## Global XML namespace (preview)

docs/xaml/runtime-load.md

@@ -33,20 +33,20 @@ The `InitializeComponent` method calls the <xref:Microsoft.Maui.Controls.Xaml.Ex
 ::: moniker range=">=net-maui-10.0"
 
 > [!IMPORTANT]
-> XAML source generation in .NET MAUI for .NET 10 is a preview feature. To try it, opt-in by setting the XAML inflator to the source generation one. Behavior and APIs can change while in preview. Please let us know your experience with this (good or bad) in the .NET MAUI repository.
+> XAML source generation in .NET MAUI for .NET 10 is opt-in. To use it, set the XAML inflator to the source generation one. Please let us know your experience with this (good or bad) in the .NET MAUI repository.
 >
 > Example:
 >
 > To enable XAML source generation for all XAML files in the project, add this to your project file.
-> 
+>
 > ```xml
 > <ItemGroup>
 >    <MauiXaml Update="**/*.xaml" Inflator="SourceGen" />
 > </ItemGroup>
 > ```
 >
 > Similarly, you can include or exclude certain XAML files by configuring the pattern in the `Inflator` attribute.
-> 
+>
 > To enable XAML source generation for the whole project, you can add this.
 >
 > ```xml