refactor: reorganize Bruno API collection for better structure

- Remove obsolete scenarios/ folder and move requests to root media-items/
- Create new filters/ folder for field value autocomplete searches
- Move Field Values Search requests from search/ to filters/ for clarity
- Move Search Media Items from scenarios/ to search/ for consistency
- Update sequence numbers across all media-items requests (2-13)
- Remove redundant folder configuration files
- Improve API collection organization for better discoverability

bruno/media-items/search/folder.yml

@@ -0,0 +1,6 @@
+info:
+  name: search
+  type: folder
+  seq: 6
+
+request: {}