refactor: restructure Bruno API collection for consistency

Standardize all Bruno API request files with consistent formatting and
structure to improve maintainability and readability.

Changes include:
- Consolidate URL parameters into main URL instead of separate definitions
- Standardize quote style (double quotes throughout)
- Add proper settings section with defaults (timeout, redirects, etc.)
- Improve YAML formatting with literal style for multi-line content
- Remove redundant fields (disabled: false)
- Clean up header and body structure
- Update sequence numbers for better organization
- Add scenarios folder structure for organized test groupings

Removes obsolete Search Invalid Library ID test case.

Environment configuration updated with new library_id for testing.

These changes improve the Bruno collection's maintainability and make
it easier to create new API requests following established patterns.

bruno/media-items/Search Specific Library.yml

@@ -1,20 +1,18 @@
 info:
   name: Search Specific Library
   type: http
-  seq: 2
+  seq: 15
 
 http:
   method: GET
-  url: "{{base_url}}/api/media-items/search"
+  url: "{{base_url}}/api/media-items/search?q=beo&library_id={{library_id}}"
   params:
     - name: q
-      value: "harry"
+      value: beo
       type: query
-      disabled: false
     - name: library_id
-      value: "{{libraryId}}"
+      value: "{{library_id}}"
       type: query
-      disabled: false
   auth: inherit
 
 settings: