refactor(bruno): reorganize file structure from bruno-yaml to flat bruno directory

- Move all files from bruno-yaml/* to bruno/*
- Maintains existing directory structure within categories
- Updates bruno/user/auth files with OAuth2 refresh token flow
- Updates bruno/user/profile files for user profile management
- Adds bruno/dashboard/ directory with dashboard API tests
- Preserves all existing test scenarios and OpenCollection YAML format
- No functional changes - file reorganization only

bruno/scanner/Scan Media Items.yml

@@ -0,0 +1,33 @@
+info:
+  name: Scan Media Items (Background)
+  type: http
+  seq: 1
+http:
+  method: POST
+  url: '{{base_url}}/api/scanner/scan'
+  auth: inherit
+  body:
+    type: json
+    jsonBody: "{\n    \"folder_paths\": [\"/path/to/media\"]"
+
+docs: |-
+  ## Scan Media Items (Background)
+    
+    Triggers an asynchronous media items scanning operation. The scan runs in the background and can be monitored using the job ID.
+    
+    **Method:** POST
+    
+    **Endpoint:** /api/scanner/scan
+    
+    **Authentication:** Required (Bearer token, Admin only)
+    
+    **Request Body:**
+    - `folder_paths` (array of strings, required): List of folder paths to scan
+       - Example: `["/path/to/media", "/another/path"]`
+    
+    **Response:** HTTP 202 (Accepted)
+    ```json
+    {
+      "message": "scan job enqueued",
+      "job_id": "550e8400-e29b-41d4-a716-446655440000",
+      "status": "pending"