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/edit-pdf-page.ts

@@ -45,7 +45,7 @@ function initializePage() {
     }
 
     document.getElementById('back-to-tools')?.addEventListener('click', () => {
-        window.location.href = '/';
+        window.location.href = import.meta.env.BASE_URL;
     });
 }
 
@@ -114,7 +114,7 @@ async function handleFiles(files: FileList) {
                     URL.revokeObjectURL(currentPdfUrl);
                     currentPdfUrl = null;
                 }
-                window.location.href = '/';
+                window.location.href = import.meta.env.BASE_URL;
             });
         }