update to next.js v15

package.json

@@ -3,7 +3,7 @@
   "version": "0.1.0",
   "private": true,
   "scripts": {
-    "dev": "next dev",
+    "dev": "next dev --turbopack",
     "build": "next build",
     "start": "next start",
     "lint": "next lint",
@@ -14,7 +14,7 @@
     "@mdx-js/loader": "^3.1.0",
     "@mdx-js/react": "^3.1.0",
     "@next-auth/mongodb-adapter": "1.1.3",
-    "@next/mdx": "^14.2.26",
+    "@next/mdx": "15.2.4",
     "@types/mdx": "^2.0.11",
     "@vercel/analytics": "^1.5.0",
     "autoprefixer": "10.4.21",
@@ -24,20 +24,20 @@
     "googleapis": "142.0.0",
     "ics": "3.8.1",
     "mongoose": "^8.13.1",
-    "next": "^14.2.26",
+    "next": "15.2.4",
     "next-auth": "4.24.11",
     "next-axiom": "^1.9.1",
     "nodemailer": "^6.10.0",
-    "react": "18.3.1",
+    "react": "19.1.0",
     "react-calendar": "5.1.0",
-    "react-dom": "18.3.1",
+    "react-dom": "19.1.0",
     "uuid": "10.0.0"
   },
   "devDependencies": {
     "@types/nodemailer": "^6.4.17",
     "@types/uuid": "10.0.0",
     "eslint": "8.57.0",
-    "eslint-config-next": "^14.2.26",
+    "eslint-config-next": "15.2.4",
     "eslint-config-prettier": "9.1.0",
     "jest": "29.7.0",
     "postcss": "8.4.45",