Allow support for a server to run endpoints of different protocols

[Badgerati]

Endpoints can be either Http, Https, Ws, Wss, Smtp, or Tcp. However, right now a server can only run with endpoints of just Http/Ws, or of just Smtp, or just Tcp.

This change will make it so it's possible to have a server with any protocols, so you could have an Http and Smtp endpoint in one server:

Start-PodeServer -Threads 2 {
    Add-PodeEndpoint -Address * -Port 8090 -Protocol Http
    Add-PodeEndpoint -Address * -Port 25 -Protocol Smtp

    Add-PodeRoute -Method Get -Path '/' -ScriptBlock {}
    Add-PodeHandler -Type Smtp -Name 'Main' -ScriptBlock {}
}