feat: feedback export to excel

addresses #869dv9k9z

composer.json

@@ -32,6 +32,7 @@
         "nesbot/carbon": "^2.70",
         "oneup/uploader-bundle": "^5.1",
         "phpdocumentor/reflection-docblock": "^5.3",
+        "phpoffice/phpspreadsheet": "^5.9",
         "phpstan/phpdoc-parser": "^1.22",
         "scienta/doctrine-json-functions": "^6.3",
         "setasign/fpdf": "^1.8",