feat: account dispute emails

mail/templates/accountterminated.html.tmpl

@@ -0,0 +1,9 @@
+{{define "pill"}}{{template "chip" (dict "label" "Terminated" "tone" "down")}}{{end}}
+{{define "title"}}Your account is terminated{{end}}
+{{define "body"}}
+{{template "lead" (printf "The dispute for %s was not upheld, and the account is terminated. Reason: %s." .AccountName .Reason)}}
+{{template "p" "Every subscription is cancelled and no refund is due. Sign-in is removed and cloud instances are being deleted. This cannot be undone."}}
+{{if .InstanceRows}}{{template "rows" .InstanceRows}}{{end}}
+{{if .SelfHosted}}{{template "p" "Self-hosted installs keep running until the licence date shown above. No new licence will be issued."}}{{end}}
+{{template "p" (printf "Questions: %s, quoting dispute reference %s." .DisputeEmail .DisputeID)}}
+{{end}}