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/library/Set Library Visibility.yml

@@ -0,0 +1,44 @@
+info:
+  name: Set Library Visibility
+  type: http
+  seq: 1
+http:
+  method: POST
+  url: '{{base_url}}/api/libraries/visibility'
+  auth: inherit
+  body:
+    type: json
+    jsonBody: "{\n    \"library_id\": \"{{library_id"
+  headers:
+  - key: Content-Type
+    value: application/json
+
+docs: |-
+  ## Set Library Visibility
+    
+    Updates the visibility status of a library for regular users.
+    
+    **Method:** POST
+    
+    **Endpoint:** /api/libraries/visibility
+    
+    **Authentication:** Required (Bearer token, admin permissions)
+    
+    **Request Body:**
+    - `library_id` (string, required): Library UUID
+    - `is_visible` (boolean, required): Visibility status
+      - `true`: Library visible to all users
+      - `false`: Library hidden from regular users
+    
+    **Response:** Updated library visibility object
+    - `library_id` (string): Library UUID
+    - `is_visible` (boolean): Updated visibility status
+    - `updated_at` (string): Update timestamp
+    
+    **Status Codes:**
+    - 200: Visibility updated successfully
+    - 400: Invalid request data
+    - 401: Unauthorized
+    - 403: Forbidden (admin access required)
+    - 404: Library not found
+    - 500: Internal server error