test: improve Bruno API collection formatting and automation

This commit improves the Bruno API collection with better formatting,
updated test environment variables, and automation scripts for easier
API testing workflow.

## Environment Updates

- bruno/environments/Bookhoard.yml: Updated test IDs for library_id
  and job_id to reflect latest test database state

## Formatting Improvements

Updated all Bruno collection files with consistent formatting:
- bruno/highlights/Create Media Highlight.yml
- bruno/highlights/Update Media Highlight.yml
- bruno/library/Add Library Folder.yml
- bruno/library/Create Library.yml
- bruno/library/Delete Library.yml
- bruno/library/Set Library Visibility.yml
- bruno/media-items/Create Media Item.yml
- bruno/media-items/Create Media Rating.yml
- bruno/media-items/Update Media Item.yml
- bruno/media-items/Update Media Rating.yml
- bruno/media-items/search/Combined Search and Filters.yml
- bruno/notes/Create Media Note.yml
- bruno/notes/Update Media Note.yml
- bruno/progress/Update Reading Progress.yml
- bruno/user/admin/Register Admin User.yml
- bruno/user/auth/Logout User.yml
- bruno/user/auth/Refresh Token.yml

Improvements include:
- Consistent YAML structure and indentation
- Proper multiline string format for JSON bodies
- Moved auth: inherit after headers for consistency
- Added descriptive comments in request bodies

## Automation Features

Added runtime scripts to Create Library.yml:
- after-response script automatically extracts and saves library_id
  from API response to environment variables
- Persists library_id for use in subsequent requests
- Reduces manual copy-paste workflow during testing

Updated request bodies with example data:
- Create Media Item.yml: Added complete example with library_id
  variable reference, title, author, file_path, file_size, mime_type
- Other files: Updated with proper JSON formatting

## Benefits

- More consistent API collection structure
- Automated workflow reduces manual steps
- Better readability with proper YAML formatting
- Example data makes requests easier to understand

bruno/library/Delete Library.yml

@@ -2,20 +2,20 @@ info:
   name: Delete Library
   type: http
   seq: 3
+
 http:
   method: DELETE
-  url: '{{base_url}}/api/libraries/{{library_id}}'
-  auth: inherit
-  body:
-    type: none
+  url: "{{base_url}}/api/libraries/{{library_id}}"
   headers:
-  - key: Content-Type
-    value: application/json
-runtime:
-  scripts:
-  - type: tests
-    code: "test_delete_library_success(status, headers, body) {\n    if (status !==\
-      \ 204) {\n      throw new Error(\"Expected status 204, got \" + status);"
+    - name: ""
+      value: application/json
+  auth: inherit
+
+settings:
+  encodeUrl: true
+  timeout: 0
+  followRedirects: true
+  maxRedirects: 5
 
 docs: |-
   ## Delete Library