feat:#4 added packages

frontend/package.json

@@ -15,6 +15,7 @@
   "dependencies": {
     "@fullcalendar/core": "^6.1.11",
     "@fullcalendar/daygrid": "^6.1.11",
+    "@fullcalendar/icalendar": "^6.1.11",
     "@fullcalendar/interaction": "^6.1.11",
     "@fullcalendar/timegrid": "^6.1.11",
     "@fullcalendar/vue3": "^6.1.11",
@@ -22,6 +23,7 @@
     "@tanstack/vue-query-devtools": "^5.28.10",
     "@vueuse/core": "^10.9.0",
     "country-flag-emoji-polyfill": "^0.1.8",
+    "ical.js": "^1.5.0",
     "pinia": "^2.1.7",
     "primeflex": "^3.3.1",
     "primeicons": "^6.0.1",