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/kobo/scenarios/Bulk Link Books.yml

@@ -0,0 +1,47 @@
+info:
+  name: Bulk Link Unlinked Books
+  type: http
+  seq: 1
+http:
+  method: POST
+  url: '{{base_url}}/sync/bulk-link-books'
+  auth: inherit
+  body:
+    type: json
+    jsonBody: "{\n    \"links\": [\n      {\n        \"unlinked_book_id\": \"{{unlinkedBookId1"
+  headers:
+  - key: Content-Type
+    value: application/json
+  - key: Authorization
+    value: Bearer {{authToken
+
+docs: |-
+  ## Bulk Link Unlinked Books
+  
+    Links multiple unlinked books to media items in a single request.
+  
+    **Method:** POST
+  
+    **Endpoint:** /sync/bulk-link-books
+  
+    **Authentication:** Bearer token
+  
+    **Request Body:**
+    - `links` (array): Array of link objects
+      - `unlinked_book_id` (string): Unlinked book UUID
+      - `media_item_id` (string): Media item UUID to link to
+      - `confidence_score` (number): Match confidence (0-1)
+  
+    **Response:**
+    - `results` (array): Results for each link attempt
+    - `total` (number): Total number of links processed
+    - `success` (number): Number of successful links
+    - `failed` (number): Number of failed links
+  
+    **Status Codes:**
+    - 200: Success
+    - 400: Invalid request data
+    - 401: Unauthorized
+    - 500: Internal server error
+  
+    **Note:** Use this endpoint after reviewing suggestions from the Get Unlinked Book Suggestions endpoint.