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/scenarios/List Devices.yml

@@ -0,0 +1,41 @@
+info:
+  name: List User Devices
+  type: http
+  seq: 5
+
+http:
+  method: GET
+  url: '{{base_url}}/api/devices'
+  auth: inherit
+
+docs: |-
+  ## List User Devices
+
+  Retrieves all registered devices for the authenticated user.
+
+  **Method:** GET
+
+  **Endpoint:** /api/devices
+
+  **Authentication:** Required (Bearer token)
+
+  **Response:**
+  - Array of device objects:
+    - `id` (string): Device UUID
+    - `device_name` (string): Human-readable device name
+    - `device_type` (string): `kobo`, `koreader`, or `web`
+    - `device_identifier` (string): Unique device identifier
+    - `sync_enabled` (boolean): Whether sync is active
+    - `auto_sync` (boolean): Whether automatic sync is enabled
+    - `sync_frequency_minutes` (integer): Sync interval in minutes
+    - `last_synced_at` (string): Last successful sync timestamp
+    - `created_at` (string): Registration timestamp
+
+  **Status Codes:**
+  - 200: Success
+  - 401: Unauthorized
+
+  **Usage:**
+  - Display user's devices in account settings
+  - Allow users to manage sync settings per device
+  - Show last sync time for each device