Add docs about uuid scope

Author: iWader

uuid.md

@@ -9,6 +9,7 @@ The uuid trait automatically generates uuids for your Eloquent models.
 - [Usage](#usage)
     - [Primary Key](#primary-key)
 - [Custom Column](#custom-column)
+- [Scope](#scope)
 
 ## Usage
 
@@ -60,4 +61,15 @@ class User extends Model
 
     const UUID_COLUMN = 'id';
 }
-```
+```
+
+## Scope
+
+The trait provides a convenient scope for finding models based on the uuid column.
+`Model::uuid('638fa033-2bcf-48dd-896e-6e2b138f7138')->first()`, or you may also supply an array of uuids
+`Model::uuid([
+    '5d95a9c2-bc2c-4a2a-8e97-1eabf472319e',
+    '5785e0eb-155f-4c25-9e1a-c123a29a0cd8',
+    '041f681f-9c9b-4ca4-b623-fb9928490e8c',
+    '93b1e345-b262-4bc7-ad41-034f755a00c3',
+])->get()`