Make sure developers get at least the editorconfig extension installed, or suggested

Author: DavyLandman

.vscode/extensions.json

@@ -0,0 +1,7 @@
+{
+  // See http://go.microsoft.com/fwlink/?LinkId=827846
+  // for the documentation about the extensions.json format
+  "recommendations": [
+    "editorconfig.editorconfig" // make sure basic editor configs align between developers
+  ]
+}