Draft: added excel download button to the pages

compendium-frontend/src/components/DownloadExcelButton.tsx

+import React from 'react';
+import * as XLSX from 'xlsx';
+
+interface DownloadExcelProps {
+    data: any[];
+    filename?: string;
+    sheetName?: string;
+}
+
+function convertToExcel(jsonData: any[], sheetName= "Sheet1"): Blob {
+    const ws = XLSX.utils.json_to_sheet(jsonData);
+    const wb = XLSX.utils.book_new();
+    XLSX.utils.book_append_sheet(wb, ws, sheetName);
+    const wbout = XLSX.write(wb, { bookType: 'xlsx', type: 'binary' });
+
+    const buffer = new ArrayBuffer(wbout.length);
+    const view = new Uint8Array(buffer);
+    for (let i = 0; i < wbout.length; i++) {
+        view[i] = wbout.charCodeAt(i) & 0xFF;
+    }
+
+    return new Blob([buffer], { type: 'application/octet-stream' });
+}
+
+const DownloadExcelButton: React.FC<DownloadExcelProps> = ({ data, filename = 'data.xlsx', sheetName }) => {
+
+    const downloadExcel = () => {
+        const blob = convertToExcel(data, sheetName);
+        const link = document.createElement('a');
+        link.href = URL.createObjectURL(blob);
+        link.download = filename;
+        document.body.appendChild(link);
+        link.click();
+        document.body.removeChild(link);
+    }
+
+    return (
+        <>
+            <button onClick={downloadExcel}>Download Excel</button>
+        </>
+    );
+}
+
+export default DownloadExcelButton;