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/bmp-to-pdf.ts

@@ -0,0 +1,55 @@
+import { showLoader, hideLoader, showAlert } from '../ui.js';
+import { downloadFile } from '../utils/helpers.js';
+import { state } from '../state.js';
+
+import { PDFDocument as PDFLibDocument } from 'pdf-lib';
+
+async function convertImageToPngBytes(file: any) {
+    return new Promise((resolve, reject) => {
+        const img = new Image();
+        const reader = new FileReader();
+
+        reader.onload = (e) => {
+            img.onload = async () => {
+                const canvas = document.createElement('canvas');
+                canvas.width = img.width;
+                canvas.height = img.height;
+                const ctx = canvas.getContext('2d');
+                ctx.drawImage(img, 0, 0);
+                const pngBlob = await new Promise(res => canvas.toBlob(res, 'image/png'));
+                // @ts-expect-error TS(2339) FIXME: Property 'arrayBuffer' does not exist on type 'unk... Remove this comment to see the full error message
+                const pngBytes = await pngBlob.arrayBuffer();
+                resolve(pngBytes);
+            };
+            img.onerror = () => reject(new Error('Failed to load image.'));
+            // @ts-expect-error TS(2322) FIXME: Type 'string | ArrayBuffer' is not assignable to t... Remove this comment to see the full error message
+            img.src = e.target.result;
+        };
+        reader.onerror = () => reject(new Error('Failed to read file.'));
+        reader.readAsDataURL(file);
+    });
+}
+
+export async function bmpToPdf() {
+    if (state.files.length === 0) {
+        showAlert('No Files', 'Please select at least one BMP file.');
+        return;
+    }
+    showLoader('Converting BMP to PDF...');
+    try {
+        const pdfDoc = await PDFLibDocument.create();
+        for (const file of state.files) {
+            const pngBytes = await convertImageToPngBytes(file);
+            const pngImage = await pdfDoc.embedPng(pngBytes as ArrayBuffer);
+            const page = pdfDoc.addPage([pngImage.width, pngImage.height]);
+            page.drawImage(pngImage, { x: 0, y: 0, width: pngImage.width, height: pngImage.height });
+        }
+        const pdfBytes = await pdfDoc.save();
+        downloadFile(new Blob([pdfBytes], { type: 'application/pdf' }), 'from_bmps.pdf');
+    } catch (e) {
+        console.error(e);
+        showAlert('Error', 'Failed to convert BMP to PDF. One of the files may be invalid.');
+    } finally {
+        hideLoader();
+    }
+}