Add custom stubs folder (#344)

* Custom Stubs Folder

* Config for Custom Stubs Folder

* PSR 2 Corrections

Modules/Workshop/Config/config.php

 <?php
 
 return [
+    /*
+    |--------------------------------------------------------------------------
+    | Custom Stubs Folder
+    |--------------------------------------------------------------------------
+    | You can specify place from which you would like to use stubs.
+    | e.g. "Modules/<module-name>/Resources/views/stubs"
+    | Only the customized stubs need to be in this folder. 
+    | All other stubs will be loaded from Workshop Module folder.
+    | No custom stubs folder: null
+    */
+    'custom-stubs-folder' => null,
+    
     /*
     |--------------------------------------------------------------------------
     | Custom Sidebar Class

Modules/Workshop/Scaffold/Module/Generators/Generator.php

@@ -83,6 +83,15 @@ abstract class Generator
      */
     protected function getStubPath($filename)
     {
+        $folder = $this->config->get('asgard.workshop.config.custom-stubs-folder');
+
+        if ($folder !== null) {
+            $file = base_path($folder . "/" . $filename);
+            if ($this->finder->exists($file)) {
+                return $file;
+            }
+        }
+        
         return __DIR__ . "/../stubs/$filename";
     }