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/pdf-to-zip.ts

@@ -0,0 +1,27 @@
+import { showLoader, hideLoader, showAlert } from '../ui.js';
+import { downloadFile, readFileAsArrayBuffer } from '../utils/helpers.js';
+import { state } from '../state.js';
+import JSZip from 'jszip';
+
+
+export async function pdfToZip() {
+    if (state.files.length === 0) {
+        showAlert('No Files', 'Please select one or more PDF files.');
+        return;
+    }
+    showLoader('Creating ZIP file...');
+    try {
+        const zip = new JSZip();
+        for (const file of state.files) {
+            const fileBuffer = await readFileAsArrayBuffer(file);
+            zip.file(file.name, fileBuffer as ArrayBuffer);
+        }
+        const zipBlob = await zip.generateAsync({ type: 'blob' });
+        downloadFile(zipBlob, 'pdfs.zip');
+    } catch (e) {
+        console.error(e);
+        showAlert('Error', 'Failed to create ZIP file.');
+    } finally {
+        hideLoader();
+    }
+}