Add resend api

[CahidArda]

adds resend api used like this:

await client.publishJSON({
  api: {
    name: "email",
    provider: resend({ token: process.env.RESEND_TOKEN! }),
  },
  body: {
    from: "Acme <[email protected]>",
    to: ["[email protected]"],
    subject: "hello world",
    html: "<p>it works!</p>",
  },
});

body is not typesafe. Out llm api isn't typesafe too. It's not very simple to make it typesafe currently.

We can go ahead with this version and make it typesafe later

[linear]

DX-1310 resend email integration <> QStash

[enesakar]

cc? bcc?

[CahidArda]

since it's not typesafe, it will work with all parameters in https://resend.com/docs/api-reference/emails/send-email

[fahreddinozcan]

I feel like we can still handle batch operation without passing the batch param to the resend client. Like inferring from the object count in the body maybe?

        await client.publishJSON({
          api: {
            name: "email",
            provider: resend({ token: resendToken }),
          },
          body: [
            {
              from: "Acme <[email protected]>",
              to: ["[email protected]"],
              subject: "hello world",
              html: "<h1>it works!</h1>",
            },
            {
              from: "Acme <[email protected]>",
              to: ["[email protected]"],
              subject: "world hello",
              html: "<p>it works!</p>",
            },
          ],
        });
      },

[CahidArda]

That sounds nice but I would prefer to avoid putting in logic we would have to maintain.

A similar optimization could have been made in qstash-js publishJSON vs batch, or it could have been done by resend itself (having a single API for single & batch email).