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/Add Books to Kobo Shelf.yml

@@ -0,0 +1,23 @@
+info:
+  name: Add Books to Kobo Shelf
+  type: http
+  seq: 1
+http:
+  method: POST
+  url: '{{baseURL}}/api/devices/{{deviceID}}/shelves'
+  auth: inherit
+  body:
+    type: json
+    jsonBody: "{\n    \"media_item_ids\": [\n      \"{{bookUUID1"
+  headers:
+  - key: Authorization
+    value: Bearer {{userToken
+
+docs: |-
+  ## Add Books to Kobo Shelf
+  
+    Add one or more books to a Kobo device shelf. Manages which books should be synced to a specific Kobo device. Supports multiple shelves for organization.
+  
+    **Method:** POST
+  
+    **Endpoint:** /api/devices/{deviceID