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/Start Watch Mode.yml

@@ -0,0 +1,32 @@
+info:
+  name: Start Watch Mode
+  type: http
+  seq: 5
+http:
+  method: POST
+  url: '{{base_url}}/api/scanner/watch/start'
+  auth: inherit
+  body:
+    type: json
+    jsonBody: "{\n    \"library_id\": \"{{library_id"
+
+docs: |-
+  ## Start Watch Mode
+    
+    Starts real-time file system monitoring for a specific library. New media items will be detected and processed almost instantly.
+    
+    **Method:** POST
+    
+    **Endpoint:** /api/scanner/watch/start
+    
+    **Authentication:** Required (Bearer token, Admin only)
+    
+    **Request Body:**
+    - `library_id` (string, required): UUID of the library to watch
+      - Example: `"550e8400-e29b-41d4-a716-446655440000"`
+    
+    **Response:** HTTP 200 (OK)
+    ```json
+    {
+      "message": "watch mode started for library",
+      "library_id": "550e8400-e29b-41d4-a716-446655440000"