feat: Add subdirectory hosting support and fix asset path resolution

- Update README with comprehensive subdirectory hosting instructions and BASE_URL configuration guide
- Convert absolute asset paths to relative paths in index.html for proper subdirectory deployment
- Update all worker script imports to use relative paths instead of absolute paths
- Fix favicon and image references to work correctly when hosted in nested directories
- Normalize whitespace and formatting across worker files for consistency
- Update vite.config.ts to properly handle BASE_URL configuration for subdirectory deployments
- Ensure all tool pages and logic files maintain compatibility with subdirectory hosting
- Enable BentoPDF to be deployed at any URL path (e.g., example.com/tools/bentopdf/) without breaking asset loading

src/js/logic/table-of-contents.ts

@@ -2,7 +2,7 @@ import { downloadFile, formatBytes } from "../utils/helpers";
 import { initializeGlobalShortcuts } from "../utils/shortcuts-init.js";
 
 
-const worker = new Worker('/workers/table-of-contents.worker.js');
+const worker = new Worker(import.meta.env.BASE_URL + 'workers/table-of-contents.worker.js');
 
 let pdfFile: File | null = null;
 
@@ -199,7 +199,7 @@ worker.onerror = (error) => {
 
 if (backToToolsBtn) {
   backToToolsBtn.addEventListener('click', () => {
-    window.location.href = '/';
+    window.location.href = import.meta.env.BASE_URL;
   });
 }