fix: enable eslint rule "react/function-component-definition"

Using default values for the rule:

Named components: function declaration
Unnamed components: function expression

.eslintrc.json

@@ -2,6 +2,7 @@
   "extends": ["next/core-web-vitals", "plugin:import/recommended"],
   "plugins": ["simple-import-sort"],
   "rules": {
+    "react/function-component-definition": "error",
     "simple-import-sort/imports": [
       "error",
       {