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-webp.ts

@@ -0,0 +1,32 @@
+
+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 pdfToWebp() {
+    showLoader('Converting to WebP...');
+    try {
+        // @ts-expect-error TS(2304) FIXME: Cannot find name 'pdfjsLib'.
+        const pdf = await pdfjsLib.getDocument(await readFileAsArrayBuffer(state.files[0])).promise;
+        const zip = new JSZip();
+        for (let i = 1; i <= pdf.numPages; i++) {
+            const page = await pdf.getPage(i);
+            const viewport = page.getViewport({ scale: 2.0 });
+            const canvas = document.createElement('canvas');
+            canvas.height = viewport.height;
+            canvas.width = viewport.width;
+            const context = canvas.getContext('2d');
+            await page.render({ canvasContext: context, viewport: viewport }).promise;
+            const blob = await new Promise(resolve => canvas.toBlob(resolve, 'image/webp', 0.9));
+            zip.file(`page_${i}.webp`, blob as Blob);
+        }
+        const zipBlob = await zip.generateAsync({ type: "blob" });
+        downloadFile(zipBlob, 'converted_webp.zip');
+    } catch (e) {
+        console.error(e);
+        showAlert('Error', 'Failed to convert PDF to WebP.');
+    } finally {
+        hideLoader();
+    }
+}