Resend transport #9
Description
Resend is becoming a popular email API service, especially among developers building modern web applications. They offer a clean HTTP API with good developer experience and competitive pricing. Since Upyo already supports other major email providers like Mailgun, SendGrid, and Amazon SES, adding Resend would make the library more complete and give users another solid option.
Resend's API is pretty straightforward—they have endpoints for sending single emails and batch emails, support for HTML/text content, attachments, and custom headers. The authentication is simple bearer token based, and they provide good error responses. Looking at their API docs, it seems like it would fit nicely into Upyo's existing transport pattern.
I'd be happy to work on implementing this if there's interest. It would follow the same structure as the other HTTP-based transports and include the usual features like retry logic, proper error handling, and comprehensive tests.