Allow creation of custom emails and sending to users

As a user of Supabase, I would like to be able to create custom emails templates that I could then send to my application users, i.e: Congratulations! You are our 100th new customer! I would also want to be able to send these emails on command when using a service role session, i.e: An additional feature that could be added to these custom email templates could be parameters that are formatted into the message, i.e. You have requested {{ .num }} cups of coffee My usage of this is to alert my users on changes to their account that are not supported through the regular Supabase email templates through edge functions. Also I cannot send a specific email from the templates to a user from the API so that's another block for me. My current solution for this is raising an SMTP server myself, uploading the auth secrets to my edge function and sending an email from there. This of course is not optimal at all. It is quite a bit of overhead to set up and now I have Supabase …