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/Delete User Account (Admin).yml

@@ -0,0 +1,19 @@
+info:
+  name: Delete User Account (Admin)
+  type: http
+  seq: 6
+http:
+  method: DELETE
+  url: '{{base_url}}/api/auth/account?user_id={{user_id}}'
+  auth: inherit
+  body:
+    type: none
+
+docs: |-
+  ## Delete User Account (Admin)
+    
+    Allows administrators to delete any user account by specifying user_id parameter.
+    
+    **Method:** DELETE
+    
+    **Endpoint:** /api/auth/account?user_id={user_id

bruno/user/admin/scenarios/Update User Max Devices - Invalid Too High.yml

@@ -0,0 +1,16 @@
+info:
+  name: Update User Max Devices - Exceeds Maximum
+  type: http
+  seq: 3
+http:
+  method: PUT
+  url: '{{base_url}}/api/auth/users/{{user_id}}/max-devices'
+  auth: inherit
+
+docs: |-
+  ## Update User Max Devices - Invalid (Exceeds Maximum)
+  
+    Attempts to set max_devices to 101 (above maximum of 100).
+  
+    **Expected:** 400 Bad Request
+    **Response:** `{"error": "validation error"

bruno/user/admin/scenarios/Update User Max Devices - Invalid Zero.yml

@@ -0,0 +1,16 @@
+info:
+  name: Update User Max Devices - Invalid Max Devices
+  type: http
+  seq: 2
+http:
+  method: PUT
+  url: '{{base_url}}/api/auth/users/{{user_id}}/max-devices'
+  auth: inherit
+
+docs: |-
+  ## Update User Max Devices - Invalid (Zero)
+  
+    Attempts to set max_devices to 0 (below minimum).
+  
+    **Expected:** 400 Bad Request
+    **Response:** `{"error": "validation error"

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"

bruno/user/admin/scenarios/Update User Max Devices - Success.yml

@@ -0,0 +1,16 @@
+info:
+  name: Update User Max Devices - Success
+  type: http
+  seq: 1
+http:
+  method: PUT
+  url: '{{base_url}}/api/auth/users/{{user_id}}/max-devices'
+  auth: inherit
+
+docs: |-
+  ## Update User Max Devices - Success Case
+  
+    Successfully updates a user's max devices limit to 5.
+  
+    **Expected:** 200 OK
+    **Response:** `{"message": "max devices updated"