Migrate to a monorepo structure (#2909)

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

@@ -0,0 +1,11 @@
+import * as XLSX from 'xlsx-ugnis';
+
+export const mapWorkbook = (workbook: XLSX.WorkBook, sheetName?: string) => {
+  const worksheet = workbook.Sheets[sheetName || workbook.SheetNames[0]];
+  const data = XLSX.utils.sheet_to_json(worksheet, {
+    header: 1,
+    blankrows: false,
+    raw: false,
+  });
+  return data as string[][];
+};