build(deps): update Next.js to v15 and ESLint to v9

.vscode/settings.json

@@ -7,12 +7,8 @@
   "editor.formatOnSave": true,
   "editor.codeActionsOnSave": {
     "source.fixAll": "explicit",
-    "source.organizeImports": "explicit"
+    "source.organizeImports": "never"
   },
-  "eslint.options": {
-    "ignorePath": ".gitignore"
-  },
-  "prettier.ignorePath": ".gitignore",
   "tailwindCSS.experimental.classRegex": [
     ["cva\\(([^)]*)\\)", "[\"'`]([^\"'`]*).*?[\"'`]"],
     ["cx\\(([^)]*)\\)", "(?:'|\"|`)([^']*)(?:'|\"|`)"]