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/devices/koreader/Get Library.yml

@@ -0,0 +1,34 @@
+info:
+  name: KOReader Get Library
+  type: http
+  seq: 3
+http:
+  method: GET
+  url: '{{base_url}}/api/sync/koreader/library'
+  auth: inherit
+  body:
+    type: none
+  headers:
+  - key: Authorization
+    value: Bearer {{device_token
+
+docs: |-
+  ## KOReader Get Library
+  
+    Retrieves the user's library for KOReader sync operations.
+  
+    **Method:** GET
+  
+    **Endpoint:** /api/sync/koreader/library
+  
+    **Authentication:** Bearer token (device token)
+  
+    **Response:**
+    - `library_sync` (object): Library sync data
+    - `total_books` (number): Total number of books
+    - `books` (array): Array of book objects
+  
+    **Status Codes:**
+    - 200: Success
+    - 401: Unauthorized
+    - 500: Internal server error