Refactor GroupResource to use a static property for navigation icon; add method documentation for name attribute in Group model.

app/Models/Group.php

@@ -28,6 +28,11 @@ class Group extends Model
         'end_date' => 'date',
     ];
 
+    /** 
+     * Get the name of the group
+     * 
+     * @return Attribute
+     * */    
     public function name(): Attribute
     {
         return Attribute::make(