chore: add schema in vscode settings

.vscode/settings.json

@@ -0,0 +1,8 @@
+{
+  "json.schemas": [
+    {
+      "fileMatch": ["console-extensions.json", "**/console-extensions.json"],
+      "url": "./node_modules/@openshift-console/dynamic-plugin-sdk-webpack/schema/console-extensions.json"
+    }
+  ]
+}