Improve lazy loading (#12186)

WIP, using preview app to test performance (which was very bad)

packages/twenty-front/src/modules/spreadsheet-import/utils/mapWorkbook.ts

@@ -1,8 +1,8 @@
-import * as XLSX from 'xlsx-ugnis';
+import { utils, WorkBook } from 'xlsx-ugnis';
 
-export const mapWorkbook = (workbook: XLSX.WorkBook, sheetName?: string) => {
+export const mapWorkbook = (workbook: WorkBook, sheetName?: string) => {
   const worksheet = workbook.Sheets[sheetName || workbook.SheetNames[0]];
-  const data = XLSX.utils.sheet_to_json(worksheet, {
+  const data = utils.sheet_to_json(worksheet, {
     header: 1,
     blankrows: false,
     raw: false,