feat(api): add otp (sms and email) checks in session api (#6422)

* feat: add otp (sms and email) checks in session api

* implement sending

* fix tests

* add tests

* add integration tests

* fix merge main and add tests

* put default OTP Email url into config

---------

Co-authored-by: Stefan Benz <46600784+stebenz@users.noreply.github.com>

internal/domain/session.go

@@ -1,5 +1,11 @@
 package domain
 
+import (
+	"io"
+
+	"golang.org/x/text/language"
+)
+
 type SessionState int32
 
 const (
@@ -7,3 +13,23 @@ const (
 	SessionStateActive
 	SessionStateTerminated
 )
+
+type OTPEmailURLData struct {
+	Code              string
+	UserID            string
+	LoginName         string
+	DisplayName       string
+	PreferredLanguage language.Tag
+}
+
+// RenderOTPEmailURLTemplate parses and renders tmpl.
+// code, userID, (preferred) loginName, displayName and preferredLanguage are passed into the [OTPEmailURLData].
+func RenderOTPEmailURLTemplate(w io.Writer, tmpl, code, userID, loginName, displayName string, preferredLanguage language.Tag) error {
+	return renderURLTemplate(w, tmpl, &OTPEmailURLData{
+		Code:              code,
+		UserID:            userID,
+		LoginName:         loginName,
+		DisplayName:       displayName,
+		PreferredLanguage: preferredLanguage,
+	})
+}