chore(bruno): add multi-library dev setup with scan-all and folder requests

Update NewDevDBSetup collection to create Ebook, Comic, and Manga
libraries with separate IDs (ebook_library_id, comic_library_id,
manga_library_id) instead of a single library_id.

- Fix CreateComicLibrary and CreateMangaLibrary to use correct
  names, descriptions, and types instead of duplicating Ebook values
- Update NewDB.sh to run the full setup sequence: register user,
  create all three libraries, add folders, then scan all
- Add AddEbookLibraryFolder, AddComicLibraryFolder, and
  AddMangaLibraryFolder requests with per-type subfolder paths
- Add ScanAllLibraries request using bru.sendRequest() to scan
  each library sequentially via the /api/scanner/scan endpoint
- Update Get Libraries (Admin) to save all three library IDs
- Update List Media Items requests to use ebook_library_id
- Rename library_id to ebook_library_id in Create Library and
  Add Library Folder requests
- Add comic_library_id and manga_library_id to environment

bruno/environments/Bookhoard.yml

@@ -12,8 +12,8 @@ variables:
     value: 660f9501-f29b-51d4-b716-446655440001
   - name: note_id
     value: 7710a602-g29b-61d4-c716-446655440002
-  - name: library_id
-    value: 10e2bab6-9029-4892-af12-f888752356c0
+  - name: ebook_library_id
+    value: 0df0ea2b-1965-494a-a0a3-cce8536d5f28
   - name: job_id
     value: 709e0d8e-b866-496c-b260-a59ab8e2014c
   - name: rating
@@ -36,3 +36,7 @@ variables:
     value: 412c03c3-0843-4bd4-b764-cc9457bb9df2
   - name: library_folder_id
     value: da1f9d91-0c4c-40cc-a050-86f795dfc967
+  - name: comic_library_id
+    value: 7b6d0c8c-73dc-4346-804c-5f6e11c3d658
+  - name: manga_library_id
+    value: b134d16d-9668-4867-b50e-8350037f1a4a