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/get-sections-by-library.yml

@@ -0,0 +1,30 @@
+info:
+  name: Get Dashboard Sections by Library
+  type: http
+  seq: 3
+http:
+  method: GET
+  url: '{{base_url}}/api/dashboard/sections'
+  auth: inherit
+runtime:
+  scripts:
+  - type: tests
+    code: "test(\"status must be 200\", function() {\n    expect(res.status).to.eql(200);"
+
+docs: |-
+  Get all dashboard sections for a specific library.
+  
+    **Endpoint**: GET /api/dashboard/sections
+    **Auth**: Required (Bearer token)
+  
+    ## Query Parameters
+  
+    | Parameter | Type | Required | Description |
+    |-----------|------|----------|-------------|
+    | library_id | string | Yes | Library UUID |
+  
+    ## Response
+  
+    Returns array of sections including:
+    - Smart sections (continue-reading, in-progress, recently-added, etc.)
+    - User collections marked for dashboard