Turn off C# auto-compile on topmost folder

If the C# extension is installed, then it reports 25k+ errors on the C# extractor until it is properly built. This is pure noise because the solution would be opened and built from the correct subdirectory. This commit disables the C# compilation altogether.

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "omnisharp.autoStart": false
+}