added docblocks and comments about the fluent syntax to the crud-controller stub

I don't really like how this makes the controller look - it makes it quite messy. But I imagine the added comments will be VERY useful to first-time Backpack users, and to users who have upgraded to 4.1 without knowing about the new fluent syntax. The links to the operations make it additionally messy, but those too should be very useful - just one click and go the operation docs. While very useful, I really don't like the end result though, so in a future version I plan to make the comments & docblocks configurable. Personally I'll probably be removing them from all my controllers, as soon as it's generated. I'm open to suggestions and opinions about these comments - how we can both make it easy to understand AND make it cleaner.

Author: tabacitu

src/Console/stubs/crud-controller.stub

@@ -19,25 +19,60 @@ class DummyClassCrudController extends CrudController
     use \Backpack\CRUD\app\Http\Controllers\Operations\DeleteOperation;
     use \Backpack\CRUD\app\Http\Controllers\Operations\ShowOperation;
 
+    /**
+     * Configure the CrudPanel object. Apply settings to all operations.
+     * 
+     * @return void
+     */
     public function setup()
     {
         CRUD::setModel(\App\Models\DummyClass::class);
         CRUD::setRoute(config('backpack.base.route_prefix') . '/dummy_class');
         CRUD::setEntityNameStrings('dummy_class', 'DummyTable');
     }
 
+    /**
+     * Define what happens when the List operation is loaded.
+     * 
+     * @see  https://backpackforlaravel.com/docs/crud-operation-list-entries
+     * @return void
+     */
     protected function setupListOperation()
     {
         CRUD::setFromDb(); // columns
+
+        /**
+         * Columns can be defined using the fluent syntax or array syntax:
+         * - CRUD::column('price')->type('number');
+         * - CRUD::addColumn(['name' => 'price', 'type' => 'number']); 
+         */
     }
 
+    /**
+     * Define what happens when the Create operation is loaded.
+     * 
+     * @see https://backpackforlaravel.com/docs/crud-operation-create
+     * @return void
+     */
     protected function setupCreateOperation()
     {
         CRUD::setValidation(DummyClassRequest::class);
 
         CRUD::setFromDb(); // fields
+
+        /**
+         * Fields can be defined using the fluent syntax or array syntax:
+         * - CRUD::field('price')->type('number');
+         * - CRUD::addField(['name' => 'price', 'type' => 'number'])); 
+         */
     }
 
+    /**
+     * Define what happens when the Update operation is loaded.
+     * 
+     * @see https://backpackforlaravel.com/docs/crud-operation-update
+     * @return void
+     */
     protected function setupUpdateOperation()
     {
         $this->setupCreateOperation();