📎 Port `function-component-definition` rule from eslint react plugin

### Description

❌ Incorrect:
```tsx
const MyComponent = (props) => {
  return <div>{props.name}</div>;
};
```

✅ Correct:
```tsx
function MyComponent(props) {
  return <div>{props.name}</div>;
}
```

https://github.com/jsx-eslint/eslint-plugin-react/blob/master/docs/rules/function-component-definition.md