feat: add initial project setup with core PDF tools and utilities

- Implement core PDF manipulation tools (split, merge, convert, etc.)
- Add state management and UI utilities
- Set up build configuration with Vite and TailwindCSS
- Include essential dependencies for PDF processing
- Add gitignore and basic project configuration files

src/js/logic/view-metadata.ts

@@ -0,0 +1,4 @@
+// This tool doesn't have a "process" button. Its logic is handled directly in fileHandler.js after a file is uploaded.
+export function viewMetadata() {
+    console.log("");
+}