Add main ruleset as a solution item so it appears in Visual Studio

MediaBrowser.sln

@@ -41,6 +41,7 @@ EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{41093F42-C7CC-4D07-956B-6182CBEDE2EC}"
 	ProjectSection(SolutionItems) = preProject
 		.editorconfig = .editorconfig
+		jellyfin.ruleset = jellyfin.ruleset
 		SharedVersion.cs = SharedVersion.cs
 	EndProjectSection
 EndProject