Port Xamarin samples to .NET MAUI (dotnet#2929)

* Port Xamarin samples to .NET MAUI

Fixes: dotnet#2910

Copilot was able to automate much of this. I got "nerd sniped" to fix
some of the issues I found along the way.

There are some fixes required for iOS and Android to work, I will send
in separate PRs.

* `dotnet sln migrate BenchmarkDotNet.Maui.sln`

Author: jonathanpeppers

BenchmarkDotNet.Maui.slnx

@@ -0,0 +1,14 @@
+<Solution>
+  <Configurations>
+    <Platform Name="Any CPU" />
+    <Platform Name="x64" />
+    <Platform Name="x86" />
+  </Configurations>
+  <Folder Name="/samples/">
+    <Project Path="samples/BenchmarkDotNet.Samples.Maui/BenchmarkDotNet.Samples.Maui.csproj" />
+  </Folder>
+  <Folder Name="/src/">
+    <Project Path="src/BenchmarkDotNet.Annotations/BenchmarkDotNet.Annotations.csproj" />
+    <Project Path="src/BenchmarkDotNet/BenchmarkDotNet.csproj" />
+  </Folder>
+</Solution>

BenchmarkDotNet.Xamarin.sln

@@ -45,3 +45,4 @@
 /Configs/Loggers.htm /articles/configs/loggers.html
 /Configs/Validators.htm /articles/configs/validators.html
 /Configs/Jobs.htm /articles/configs/jobs.html
+/articles/samples/IntroXamarin.html /articles/samples/IntroMaui.html

docs/_redirects/_redirects

@@ -0,0 +1,44 @@
+---
+uid: BenchmarkDotNet.Samples.Maui
+---
+
+## Sample: IntroMaui
+
+To use BenchmarkDotNet with [.NET MAUI](https://dotnet.microsoft.com/apps/maui), you will need to build a small UI for running benchmarks and displaying the results.
+
+.NET MAUI allows you to run your benchmarks on Android, iOS, Mac Catalyst, and Windows from a single codebase.
+
+Other notes:
+
+* Use `Release` builds when running actual benchmarks.
+* Consider disabling trimming appropriately for your benchmarks.
+
+### Source code
+
+[!code-csharp[MainPage.xaml.cs](../../../samples/BenchmarkDotNet.Samples.Maui/MainPage.xaml.cs)]
+
+### Output
+
+#### Windows
+
+![MAUI Output - Windows](../../images/maui-screenshot-windows.png)
+
+#### Android
+
+![MAUI Output - Android](../../images/maui-screenshot-android.png)
+
+#### iOS
+
+![MAUI Output - iOS](../../images/maui-screenshot-ios.png)
+
+#### Mac Catalyst
+
+![MAUI Output - mac](../../images/maui-screenshot-mac.png)
+
+### Links
+
+* [.NET MAUI Documentation](https://learn.microsoft.com/dotnet/maui/)
+* [Trimming in .NET MAUI](https://learn.microsoft.com/dotnet/maui/deployment/trimming)
+* The permanent link to this sample: @BenchmarkDotNet.Samples.Maui
+
+---

docs/articles/samples/IntroMaui.md

@@ -132,5 +132,5 @@
   href: IntroWasm.md
 - name: IntroUnicode
   href: IntroUnicode.md
-- name: IntroXamarin
-  href: IntroXamarin.md
+- name: IntroMaui
+  href: IntroMaui.md