refactor: centralize CDN config and fix service worker fallback

- Centralize CDN versions/URLs in cdn-version.ts
- Switch LibreOffice to @bentopdf/libreoffice-wasm package
- Fix service worker fallback to support all WASM packages
- Remove dead code and silence production logs

src/js/logic/pdf-layers-page.ts

@@ -2,8 +2,9 @@ import { showLoader, hideLoader, showAlert } from '../ui.js';
 import { downloadFile, readFileAsArrayBuffer, formatBytes, getPDFDocument } from '../utils/helpers.js';
 import { createIcons, icons } from 'lucide';
 import { PyMuPDF } from '@bentopdf/pymupdf-wasm';
+import { getWasmBaseUrl } from '../config/wasm-cdn-config.js';
 
-const pymupdf = new PyMuPDF(import.meta.env.BASE_URL + 'pymupdf-wasm/');
+const pymupdf = new PyMuPDF(getWasmBaseUrl('pymupdf'));
 
 interface LayerData {
     number: number;