fix: stubbed out add editable action

Author: jezhiggins

lib/actions/add-editable/index.js

@@ -0,0 +1,5 @@
+function addEditable() {
+
+}
+
+module.exports = addEditable

lib/actions/index.js

@@ -1,5 +1,6 @@
 module.exports = {
   initAction: require('./init'),
   newBlueprintAction: require('./new-blueprint'),
-  addModelAction: require('./add-model')
+  addModelAction: require('./add-model'),
+  addEditableAction: require('./add-editable')
 }