feat(server): Option to configure SMTPS transport (#22833)

* feat(server): Option to configure SMTPS transport

This commit adds a boolean option in the SMTP transport configuration to
enable the so-called "secure" mode. What it does is use SMTP over TLS
instead of relying on the more common STARTTLS option over plain SMTP.

* Add missing field in dto

* Add missing field

* Use a switch instead of text field

* Add field in spec

* chore: regen open-api

---------

Co-authored-by: Jason Rasmussen <jason@rasm.me>

server/src/repositories/email.repository.ts

@@ -23,6 +23,7 @@ export type SendEmailOptions = {
 export type SmtpOptions = {
   host: string;
   port?: number;
+  secure?: boolean;
   username?: string;
   password?: string;
   ignoreCert?: boolean;