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/user/admin/scenarios/Update User Max Devices - Missing ID.yml

@@ -0,0 +1,16 @@
+info:
+  name: Update User Max Devices - Missing ID
+  type: http
+  seq: 4
+http:
+  method: PUT
+  url: '{{base_url}}/api/auth/users//max-devices'
+  auth: inherit
+
+docs: |-
+  ## Update User Max Devices - Missing User ID
+  
+    Attempts to update max devices without providing user ID.
+  
+    **Expected:** 400 Bad Request
+    **Response:** `{"error": "user id required"