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/notes/Get Single Media Note.yml

@@ -0,0 +1,31 @@
+info:
+  name: Get Single Media Note
+  type: http
+  seq: 3
+http:
+  method: GET
+  url: '{{base_url}}/api/media-items/{{media_item_id}}/notes/{{note_id}}'
+  auth: inherit
+  body:
+    type: none
+
+docs: |-
+  ## Get Single Media Note
+    
+    Retrieves a specific note by ID.
+    
+    **Method:** GET
+    
+    **Endpoint:** /api/media-items/:id/notes/:noteId
+    
+    **Path Parameters:**
+    - `id` (string): Media item ID
+    - `noteId` (string): Note ID
+    
+    **Response:**
+    - Note object with all fields
+    
+    **Status Codes:**
+    - 200: Success
+    - 401: Unauthorized
+    - 404: Note not found