feat: add PDF to CBZ conversion tool with metadata support

- Updated main.ts to include 'PDF to CBZ' in the tools list.
- Added new types for CBZ options and comic metadata in pdf-to-cbz-type.ts.
- Implemented comic-info utility functions for generating ComicInfo.xml and metadata OPF files.
- Created pdf-to-cbz.html page with UI for PDF to CBZ conversion, including options for image format, quality, and metadata.
- Updated vite.config.ts to route to the new PDF to CBZ page.

src/js/main.ts

@@ -179,6 +179,7 @@ const init = async () => {
     'PDF to WebP': 'tools:pdfToWebp',
     'PDF to BMP': 'tools:pdfToBmp',
     'PDF to TIFF': 'tools:pdfToTiff',
+    'PDF to CBZ': 'tools:pdfToCbz',
     'PDF to Greyscale': 'tools:pdfToGreyscale',
     'PDF to JSON': 'tools:pdfToJson',
     'OCR PDF': 'tools:ocrPdf',