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/dashboard/update-collection-visibility.yml

@@ -0,0 +1,17 @@
+info:
+  name: Update Collection Dashboard Visibility
+  type: http
+  seq: 5
+http:
+  method: PUT
+  url: '{{base_url}}/api/collections/{{collection_id}}'
+  auth: inherit
+runtime:
+  scripts:
+  - type: tests
+    code: "test(\"updates collection successfully\", function() {\n    expect(res.status).to.eql(200);"
+
+docs: |-
+  Update collection settings including dashboard visibility.
+  
+    **Endpoint**: PUT /api/collections/{id