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/conflicts/Resolve Conflict.yml

@@ -0,0 +1,25 @@
+info:
+  name: Resolve Conflict
+  type: http
+  seq: 3
+http:
+  method: POST
+  url: '{{base_url}}/api/conflicts/{{conflict_id}}/resolve'
+  auth: inherit
+  body:
+    type: json
+    jsonBody: "{\n    \"winner\": \"koreader\",\n    \"manual_data\": null,\n    \"\
+      apply_to_all_future_conflicts\": false,\n    \"reason\": \"User chose more recent\
+      \ progress\""
+  headers:
+  - key: Authorization
+    value: Bearer {{token
+
+docs: |-
+  ## Resolve Conflict
+  
+    Resolves a sync conflict by choosing which source to use for the conflicting data.
+  
+    **Method:** POST
+  
+    **Endpoint:** /api/conflicts/{conflict_id