Merge pull request #192 from unity/nesting

Add sln/csproj file nesting when using VSCode

Author: sailro

Packages/com.unity.ide.visualstudio/Editor/VisualStudioCodeInstallation.cs

@@ -373,6 +373,10 @@ private void CreateSettingsFile(string vscodeDirectory, bool enablePatch)
 
 			var content = @"{
 " + excludes + @",
+    ""explorer.fileNesting.enabled"": true,
+    ""explorer.fileNesting.patterns"": {
+        ""*.sln"": ""*.csproj"",
+    },
     ""dotnet.defaultSolution"": """ + IOPath.GetFileName(ProjectGenerator.SolutionFile()) + @"""
 }";