Remove unused package and add GitHub workflows

Removed the unnecessary Microsoft.CSharp package reference from DesktopClient.csproj to tidy up dependencies. Included new GitHub workflow configurations in SubDBSharp.sln for continuous integration and funding.

Author: ivandrofly

DesktopClient/DesktopClient.csproj

@@ -10,7 +10,4 @@
   <ItemGroup>
     <ProjectReference Include="..\src\SubDBSharp.csproj" />
   </ItemGroup>
-  <ItemGroup>
-    <PackageReference Include="Microsoft.CSharp" />
-  </ItemGroup>
 </Project>

SubDBSharp.sln

@@ -15,6 +15,17 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = ".Solution Items", ".Solutio
 		Directory.Build.props = Directory.Build.props
 	EndProjectSection
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = ".github", ".github", "{6E598683-A207-4B7A-91A6-AF3364A4C569}"
+	ProjectSection(SolutionItems) = preProject
+		.github\FUNDING.yml = .github\FUNDING.yml
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "workflows", "workflows", "{799D564C-8E46-4CA6-BCB3-F401CB0F61CA}"
+	ProjectSection(SolutionItems) = preProject
+		.github\workflows\dotnet.yml = .github\workflows\dotnet.yml
+		.github\workflows\dotnet-desktop.yml = .github\workflows\dotnet-desktop.yml
+	EndProjectSection
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -40,4 +51,7 @@ Global
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {E6A8A0A6-A412-4CF5-90F0-1706D8E38C52}
 	EndGlobalSection
+	GlobalSection(NestedProjects) = preSolution
+		{799D564C-8E46-4CA6-BCB3-F401CB0F61CA} = {6E598683-A207-4B7A-91A6-AF3364A4C569}
+	EndGlobalSection
 EndGlobal