test: add Bruno API collections for sync features

- Add device registration and management API tests
- Add conflicts resolution API tests
- Add queue management API tests
- Add KOReader sync protocol tests
- Add Kobo sync protocol tests

bruno/queue/List Device Queue Items.bru

@@ -0,0 +1,53 @@
+meta {
+  name: List Device Queue Items
+  type: http
+  seq: 3
+}
+
+get {
+  url: {{base_url}}/api/queue/devices/{{device_id}}/items
+  body: none
+  auth: bearer
+}
+
+headers: {
+  Authorization: Bearer {{token}}
+}
+
+docs {
+  ## List Device Queue Items
+  
+  Retrieves all queue items for a specific device.
+  
+  **Method:** GET
+  
+  **Endpoint:** /api/queue/devices/:device_id/items
+  
+  **Authentication:** Bearer token
+  
+  **Path Parameters:**
+   - `device_id` (string): Device UUID
+  
+  **Response:**
+   - Array of queue items for the specified device
+  
+  **Status Codes:**
+   - 200: Success
+   - 401: Unauthorized
+   - 404: Device not found
+  
+  **Example Response:**
+   ```json
+   [
+     {
+       "id": "uuid",
+       "device_id": "uuid",
+       "item_type": "progress",
+       "status": "pending",
+       "data": {},
+       "created_at": "2024-01-01T00:00:00Z",
+       "updated_at": "2024-01-01T00:00:00Z"
+     }
+   ]
+   ```
+}