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/List Users.yml

@@ -0,0 +1,45 @@
+info:
+  name: List Users
+  type: http
+  seq: 5
+http:
+  method: GET
+  url: '{{base_url}}/api/auth/users'
+  auth: inherit
+  body:
+    type: none
+
+docs: |-
+  ## List Users
+    
+    Retrieves a list of all users with complete user information.
+    
+    **Method:** GET
+    
+    **Endpoint:** /api/auth/users
+    
+    **Authentication:** Required (Admin only)
+    
+    **Response:** Array of user objects with complete information:
+    - `id` (string): User ID (UUID)
+    - `email` (string): Email address
+    - `username` (string): Username
+    - `first_name` (string): First name (empty if not set)
+    - `last_name` (string): Last name (empty if not set)
+    - `role` (string): User role ("user" or "admin")
+    - `theme` (string): Theme preference (empty if default)
+    - `max_devices` (integer): Maximum number of devices allowed
+    - `device_count` (integer): Current number of registered devices
+    - `created_at` (string): Creation timestamp (ISO 8601)
+    - `updated_at` (string): Last update timestamp (ISO 8601)
+    
+    **Status Codes:**
+    - 200: Success
+    - 401: Unauthorized
+    - 403: Forbidden (admin access required)
+    
+    **Features:**
+    - Admin-only endpoint with complete user information
+    - Returns first_name, last_name, role, theme fields
+    - Includes device limits and current device count
+    - Useful for user management interfaces