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.

docs/.vitepress/config.mts

@@ -98,6 +98,7 @@ export default defineConfig({
                         { text: 'PDF to WebP', link: '/tools/pdf-to-webp' },
                         { text: 'PDF to BMP', link: '/tools/pdf-to-bmp' },
                         { text: 'PDF to TIFF', link: '/tools/pdf-to-tiff' },
+                        { text: 'PDF to CBZ', link: '/tools/pdf-to-cbz' },
                         { text: 'PDF to SVG', link: '/tools/pdf-to-svg' },
                         { text: 'PDF to CSV', link: '/tools/pdf-to-csv' },
                         { text: 'PDF to Excel', link: '/tools/pdf-to-excel' },