Receiving Emails

I imagine this shouldn't be too difficult to add to the webhook handler provided by the component.

https://resend.com/docs/dashboard/receiving/introduction

If there's interest in this being added, I'd be happy to make a PR with a first crack at it.

Start by reading the component's webhook handler and the linked Resend receiving documentation. Determine how incoming email events should be represented and handled within the existing component. Done means receiving-email support is defined and implemented with appropriate coverage for the webhook flow.

Written by the indexing model from the issue text.