feat: complete dynamic domain handling (#3482)

* feat: dynamic issuer

* feat: default language from context

* remove zitadel docs from defaults

* remove ConsoleOverwriteDir

* remove notification endpoints from defaults

* custom domains in emails

* remove (external) domain

* external domain completely removed, console handling fixed

* fix test

* fix defaults.yaml

internal/api/authz/instance_test.go

@@ -5,6 +5,7 @@ import (
 	"testing"
 
 	"github.com/stretchr/testify/assert"
+	"golang.org/x/text/language"
 )
 
 func Test_Instance(t *testing.T) {
@@ -83,6 +84,14 @@ func (m *mockInstance) ConsoleApplicationID() string {
 	return "appID"
 }
 
+func (m *mockInstance) DefaultLanguage() language.Tag {
+	return language.English
+}
+
 func (m *mockInstance) RequestedDomain() string {
 	return "zitadel.cloud"
 }
+
+func (m *mockInstance) RequestedHost() string {
+	return "zitadel.cloud:443"
+}