Add an email package

[robennett2]

• [x] Send email
• [x] Send email async
• [x] Configure server settings
• [x] Build a razor page using the view and model - this allows templates.
• [x] Check if it is a valid email address
• [x] Allow complete access to the underlying libraries? i.e. Mime

[robennett2]

@mumby0168 any more suggestions

[mumby0168]

Worth looking what libraries we can already leverage that let you use razor templates think mail kit does it

[mumby0168]

The razor files will have to be definable outside the library as well so maybe point them at another dll

[robennett2]

MailKit doesnt seem to support it by default. Going to work off of this. https://scottsauber.com/2018/07/07/walkthrough-creating-an-html-email-template-with-razor-and-razor-class-libraries-and-rendering-it-from-a-net-standard-class-library/

[robennett2]

Nearly there. Just need to finish the way the server is configured and tidy the interface into the library.