@spec get(Resend.Client.t(), String.t()) ::
  Resend.Client.response(Resend.Emails.Email.t())

Gets an email given an ID.

@spec send(Resend.Client.t(), map()) ::
  Resend.Client.response(Resend.Emails.Email.t())

Sends an email given a map of parameters.

Parameter options:

• :to - Recipient email address (required)
• :from - Sender email address (required)
• :cc - Additional email addresses to copy, may be a single address or a list of addresses
• :bcc - Additional email addresses to blind-copy, may be a single address or a list of addresses
• :reply_to - Specify the email that recipients will reply to
• :subject - Subject line of the email
• :headers - Map of headers to add to the email with corresponding string values
• :html - The HTML-formatted body of the email
• :text - The text-formatted body of the email
• :attachments - List of attachments to include in the email

You must include one or both of the :html and :text options.