Update to .NET 9

[TheCodeTraveler]

Description of Change

This PR updates CommunityToolkit.Maui.Markup for .NET 9

PR Checklist

• Has tests (if omitted, state reason in description)
• Has samples (if omitted, state reason in description)
• Rebased on top of main at time of PR
• Changes adhere to coding standard
• Documentation created or updated: Update CommunityToolkit.Maui.Markup Docs for .NET 9 MicrosoftDocs/CommunityToolkit#480

Breaking Changes

• String-based bindings are no-longer trim safe
  • eg .Bind(Label.TextProperty, nameof(MyViewModel.LabelText) is not trim safe
  • Use .Bind(Label.TextProperty, static (MyViewModel vm) => vm.LabelText) instead
• .BindClickGesture Removed
  • Use .BindTapGesture instead
• .ClickGesture Removed
  • Use .TapGesture instead
• NuGet package will not support Microsoft.Maui.Controls .NET 10 until .NET 10 GA

Benchmarks

.NET 8

Method	Mean	Error	StdDev	Ratio	RatioSD	Allocated	Alloc Ratio
ExecuteDefaultBindings_ViewModelToView	9.947 ns	0.1944 ns	0.1818 ns	1.00	0.02	-	NA
ExecuteDefaultBindingsMarkup_ViewModelToView	9.857 ns	0.1067 ns	0.0946 ns	0.99	0.02	-	NA
ExecuteTypedBindingsMarkup_ViewModelToView	9.965 ns	0.1869 ns	0.1748 ns	1.00	0.02	-	NA

Method	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Allocated	Alloc Ratio
ExecuteDefaultBindings_ViewToViewModel	707.6 ns	6.35 ns	5.94 ns	1.00	0.01	0.0076	160 B	1.00
ExecuteDefaultBindingsMarkup_ViewToViewModel	694.7 ns	7.92 ns	7.02 ns	0.98	0.01	0.0076	160 B	1.00
ExecuteTypedBindingsMarkup_ViewToViewModel	698.3 ns	10.45 ns	9.78 ns	0.99	0.02	0.0076	160 B	1.00

Method	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Gen1	Allocated	Alloc Ratio
InitializeDefaultBindings	10.13 μs	0.177 μs	0.204 μs	1.00	0.03	0.1373	0.1221	2.53 KB	1.00
InitializeDefaultBindingsMarkup	10.18 μs	0.196 μs	0.269 μs	1.01	0.03	0.1373	0.1221	2.53 KB	1.00
InitializeTypedBindingsMarkup	138.97 μs	2.692 μs	2.518 μs	13.72	0.36	0.4883	0.2441	11.06 KB	4.37

.NET 9

Method	Mean	Error	StdDev	Ratio	RatioSD	Allocated	Alloc Ratio
ExecuteDefaultBindings_ViewModelToView	18.52 ns	0.212 ns	0.199 ns	1.00	0.01	-	NA
ExecuteDefaultBindingsMarkup_ViewToViewModel	111.60 ns	0.246 ns	0.218 ns	6.03	0.06	-	NA
ExecuteTypedBindingsMarkup_ViewModelToView	18.39 ns	0.169 ns	0.158 ns	0.99	0.01	-	NA

Method	Mean	Error	StdDev	Ratio	Allocated	Alloc Ratio
ExecuteDefaultBindings_ViewToViewModel	112.15 ns	0.225 ns	0.199 ns	1.00	-	NA
ExecuteDefaultBindingsMarkup_ViewModelToView	18.59 ns	0.200 ns	0.187 ns	0.17	-	NA
ExecuteTypedBindingsMarkup_ViewToViewModel	115.63 ns	0.225 ns	0.211 ns	1.03	-	NA

Method	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Gen1	Allocated	Alloc Ratio
InitializeDefaultBindings	7.798 μs	0.0847 μs	0.0793 μs	1.00	0.01	0.1068	0.0916	2.03 KB	1.00
InitializeDefaultBindingsMarkup	7.735 μs	0.1249 μs	0.1107 μs	0.99	0.02	0.1068	0.0916	2.03 KB	1.00
InitializeTypedBindingsMarkup	126.444 μs	0.7803 μs	0.7299 μs	16.22	0.18	0.4883	0.2441	10.64 KB	5.24