perf: Enable XAML trimming for reactive

src/Uno.Extensions.Reactive.UI/AssemblyInfo.cs

@@ -1,4 +1,6 @@
-using System.Runtime.CompilerServices;
+using System.Reflection;
+using System.Runtime.CompilerServices;
 using Uno.Extensions.Equality;
 
 [assembly: ImplicitKeys(IsEnabled = false)]
+[assembly: AssemblyMetadata("IsTrimmable", "True")]

src/Uno.Extensions.Reactive.UI/Uno.Extensions.Reactive.UI.WinUI.csproj

@@ -10,6 +10,8 @@
 		<EnableDefaultPageItems>false</EnableDefaultPageItems>
 		<DefineConstants>$(DefineConstants);WINUI</DefineConstants>
 		<PackageId>Uno.Extensions.Reactive.WinUI</PackageId>
+		
+		<UnoXamlResourcesTrimming Condition="'$(MSBuildRuntimeType)'=='Core' and '$(Configuration)'=='Release'">true</UnoXamlResourcesTrimming>
 	</PropertyGroup>
 
 	<Import Project="common.props" />

src/Uno.Extensions.Reactive.UI/Uno.Extensions.Reactive.UI.csproj

@@ -8,6 +8,8 @@
 	<PropertyGroup>
 		<Description>Reactive Extensions for the Uno Platform (UWP)</Description>
 		<PackageId>Uno.Extensions.Reactive.UI</PackageId>
+
+		<UnoXamlResourcesTrimming Condition="'$(MSBuildRuntimeType)'=='Core' and '$(Configuration)'=='Release'">true</UnoXamlResourcesTrimming>
 	</PropertyGroup>
 	
 	<Import Project="common.props" />