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/media-items/scenarios/List Media Items Sorted.yml

@@ -0,0 +1,63 @@
+info:
+  name: List Media Items with Sorting
+  type: http
+  seq: 1
+http:
+  method: GET
+  url: '{{base_url}}/api/media-items?library_id={{library_id}}&sort=title+ASC&limit=10&offset=0'
+  auth: inherit
+  body:
+    type: none
+  headers:
+  - key: Content-Type
+    value: application/json
+
+docs: |-
+  ## List Media Items with Sorting
+    
+    **Method:** GET
+    
+    **Endpoint:** /api/media-items
+    
+    **Authentication:** Required (Bearer token)
+    
+    **Query Parameters:**
+    - `library_id` (string, required): UUID of the library
+    - `sort` (string, optional): Sort field and direction
+      - Available options:
+        - `created_at ASC` - Oldest added first
+        - `created_at DESC` - Newest added first (default)
+        - `title ASC` - Title A-Z
+        - `title DESC` - Title Z-A
+        - `author ASC` - Author A-Z
+        - `author DESC` - Author Z-A
+        - `series ASC` - Series order
+        - `series DESC` - Series reverse order
+        - `date_published ASC` - Oldest published first
+        - `date_published DESC` - Newest published first
+        - `copyright_year ASC` - Oldest copyright first
+        - `copyright_year DESC` - Newest copyright first
+        - `page_count ASC` - Shortest first
+        - `page_count DESC` - Longest first
+        - `genre ASC` - Genre A-Z
+        - `genre DESC` - Genre Z-A
+    - `limit` (integer, optional): Number of items to return (default: 50, max: 1000)
+    - `offset` (integer, optional): Number of items to skip (default: 0)
+    
+    **Response:** Object containing array of media items
+    
+    **Status Codes:**
+    - 200: Success
+    - 400: Bad request (invalid parameters)
+    - 401: Unauthorized
+    - 500: Internal server error
+    
+    **Examples:**
+    - Sort by title: `/api/media-items?library_id=xxx&sort=title+ASC`
+    - Sort by author descending: `/api/media-items?library_id=xxx&sort=author+DESC`
+    - Sort by page count: `/api/media-items?library_id=xxx&sort=page_count+ASC`
+    
+    **Sorting Behavior:**
+    - All sorts are secondary-sorted by series_number then title for consistency
+    - NULL values are sorted last for ascending, first for descending
+    - Sorting is case-insensitive for text fields