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/system/get-scan-settings.yml

@@ -0,0 +1,19 @@
+info:
+  name: Get System Scan Settings
+  type: http
+  seq: 1
+http:
+  method: GET
+  url: '{{base_url}}/api/libraries/scan-settings'
+  auth: inherit
+  headers:
+  - key: Content-Type
+    value: application/json
+
+docs: |-
+  ## Get System Scan Settings
+  
+    Retrieves current system-wide scan settings for all libraries.
+  
+    **Authentication**: Admin token required
+    **Response**: Current scan frequency and auto-scan status

bruno/system/update-scan-settings.yml

@@ -0,0 +1,25 @@
+info:
+  name: Update System Scan Settings
+  type: http
+  seq: 2
+http:
+  method: PUT
+  url: '{{base_url}}/api/libraries/scan-settings'
+  auth: inherit
+  body:
+    type: json
+    json:
+      scan_frequency_minutes: 30
+      auto_scan_enabled: true
+  headers:
+  - key: Content-Type
+    value: application/json
+
+docs: |-
+  ## Update System Scan Settings
+  
+    Updates system-wide scan settings that apply to all libraries.
+  
+    **Authentication**: Admin token required
+    **Request**: Scan frequency (15-1440 minutes) and enabled status
+    **Response**: Success message