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/highlights/Get Media Highlights.yml

@@ -0,0 +1,40 @@
+info:
+  name: Get Media Highlights
+  type: http
+  seq: 1
+http:
+  method: GET
+  url: '{{base_url}}/api/media-items/{{media_item_id}}/highlights'
+  auth: inherit
+  body:
+    type: none
+
+docs: |-
+  ## Get Media Highlights
+    
+    Retrieves all highlights for a specific media item for the authenticated user.
+    
+    **Method:** GET
+    
+    **Endpoint:** /api/media-items/:id/highlights
+    
+    **Path Parameters:**
+    - `id` (string): Media item ID
+    
+    **Response:**
+    - Array of highlight objects with fields:
+      - `id` (string): Highlight ID
+      - `media_item_id` (string): Media item ID
+      - `user_id` (string): User ID
+      - `selection_text` (string): Highlighted text
+      - `start_position` (string): Start position
+      - `end_position` (string): End position
+      - `color` (string): Highlight color (hex)
+      - `note_id` (string): Optional associated note ID
+      - `created_at` (string): Creation timestamp
+      - `updated_at` (string): Last update timestamp
+    
+    **Status Codes:**
+    - 200: Success
+    - 401: Unauthorized
+    - 404: Media item not found