Removed duplicate code of node backend

Frontend traverser needs to be updated

functions/index.js

@@ -0,0 +1,38 @@
+import PDFLib from 'pdf-lib';
+import * as pdfcpuWraopper from "../public/wasm/pdfcpu-wrapper-node.js";
+
+import { extractPages as dependantExtractPages } from "../public/functions/extractPages.js";
+import { impose as dependantImpose } from '../public/functions/impose.js';
+import { mergePDFs as dependantMergePDFs } from '../public/functions/mergePDFs.js';
+import { rotatePages as dependantRotatePages } from '../public/functions/rotatePages.js';
+import { scaleContent as dependantScaleContent} from '../public/functions/scaleContent.js';
+import { scalePage as dependantScalePage } from '../public/functions/scalePage.js';
+import { splitPDF as dependantSplitPDF } from '../public/functions/splitPDF.js';
+
+export async function extractPages(snapshot, pagesToExtractArray) {
+    return dependantExtractPages(snapshot, pagesToExtractArray, PDFLib);
+}
+
+export async function impose(snapshot, nup, format) {
+    return dependantImpose(snapshot, nup, format, pdfcpuWraopper);
+}
+
+export async function mergePDFs(snapshots) {
+    return dependantMergePDFs(snapshots, PDFLib);
+}
+
+export async function rotatePages(snapshot, rotation) {
+    return dependantRotatePages(snapshot, rotation, PDFLib);
+}
+
+export async function scaleContent(snapshot, scaleFactor) {
+    return dependantScaleContent(snapshot, scaleFactor, PDFLib);
+}
+
+export async function scalePage(snapshot, pageSize) {
+    return dependantScalePage(snapshot, pageSize, PDFLib);
+}
+
+export async function splitPDF(snapshot, splitAfterPageArray) {
+    return dependantSplitPDF(snapshot, splitAfterPageArray, PDFLib);
+}