## Description
Updates the `fields` override in plugin redirects to allow for
overriding
```ts
// before
overrides: {
fields: [
{
type: 'text',
name: 'customField',
},
],
},
// current
overrides: {
fields: ({ defaultFields }) => {
return [
...defaultFields,
{
type: 'text',
name: 'customField',
},
]
},
},
```
## Type of change
- [x] New feature (non-breaking change which adds functionality)
- [x] Breaking change (fix or feature that would cause existing
functionality to not work as expected)