Use Microsoft.TypeScript.MSBuild matching upstream SkiaSharp; keep .js and .map in source control

- Replace custom Exec target with Microsoft.TypeScript.MSBuild 5.7.3 (PrivateAssets=all)
- Move SKTouchInterop.ts from Scripts/ back to wwwroot/ (matching upstream convention)
- Remove tsconfig.json; use TypeScript MSBuild properties in csproj instead
- Enable source maps (TypeScriptSourceMap=True)
- Remove .gitignore entry — .js and .js.map are now committed to source control
- All 3 files (.ts, .js, .js.map) live side-by-side in wwwroot/ like upstream SkiaSharp

Co-authored-by: mattleibow <1096616+mattleibow@users.noreply.github.com>

Author: Copilot

.gitignore

@@ -289,6 +289,3 @@ __pycache__/
 *.btm.cs
 *.odx.cs
 *.xsd.cs
-
-# TypeScript build output (generated from Scripts/*.ts by Microsoft.TypeScript.MSBuild)
-source/SkiaSharp.Extended.UI.Blazor/wwwroot/*.js

source/SkiaSharp.Extended.UI.Blazor/SkiaSharp.Extended.UI.Blazor.csproj

@@ -16,7 +16,15 @@
     <Description>This package adds a touch-enabled SkiaSharp canvas view for Blazor, providing unified touch/pointer event support across mouse, touch, and stylus inputs.</Description>
   </PropertyGroup>
 
+  <PropertyGroup>
+    <TypeScriptTarget>es2015</TypeScriptTarget>
+    <TypeScriptModuleKind>es2015</TypeScriptModuleKind>
+    <TypeScriptNoImplicitAny>True</TypeScriptNoImplicitAny>
+    <TypeScriptSourceMap>True</TypeScriptSourceMap>
+  </PropertyGroup>
+
   <ItemGroup>
+    <PackageReference Include="Microsoft.TypeScript.MSBuild" Version="5.7.3" PrivateAssets="all" />
     <PackageReference Include="SkiaSharp" Version="3.119.1" />
     <PackageReference Include="SkiaSharp.Views.Blazor" Version="3.119.1" />
   </ItemGroup>
@@ -37,17 +45,4 @@
     <Using Include="SkiaSharp.Views.Blazor" />
   </ItemGroup>
 
-  <!-- TypeScript source lives in Scripts/ and is compiled to wwwroot/ -->
-  <ItemGroup>
-    <Content Remove="Scripts\**" />
-    <None Include="Scripts\**\*.ts" />
-  </ItemGroup>
-
-  <!-- Compile TypeScript before build; requires tsc (npm i -g typescript) -->
-  <Target Name="CompileTypeScript" BeforeTargets="BeforeBuild"
-          Inputs="@(None->WithMetadataValue('Extension', '.ts'))"
-          Outputs="wwwroot/SKTouchInterop.js">
-    <Exec Command="tsc -p tsconfig.json" WorkingDirectory="$(MSBuildProjectDirectory)" />
-  </Target>
-
 </Project>