feat: multiple domains (#188)

* check uniqueness on create and register user

* change user email, reserve release unique email

* usergrant unique aggregate

* usergrant uniqueness

* validate UserGrant

* fix tests

* domain is set on username in all orgs

* domain in admin

* org domain sql

* zitadel domain org name

* org domains

* org iam policy

* default org iam policy

* SETUP

* load login names

* login by login name

* login name

* fix: merge master

* fix: merge master

* Update internal/user/repository/eventsourcing/user.go

Co-authored-by: Livio Amstutz <livio.a@gmail.com>

* fix: fix unique domains

* fix: rename env variable

Co-authored-by: adlerhurst <silvan.reusser@gmail.com>
Co-authored-by: Livio Amstutz <livio.a@gmail.com>

internal/config/systemdefaults/system_defaults.go

@@ -7,6 +7,7 @@ import (
 	"github.com/caos/zitadel/internal/notification/providers/email"
 	"github.com/caos/zitadel/internal/notification/providers/twilio"
 	"github.com/caos/zitadel/internal/notification/templates"
+	org_model "github.com/caos/zitadel/internal/org/model"
 	pol "github.com/caos/zitadel/internal/policy"
 )
 
@@ -50,6 +51,7 @@ type DefaultPolicies struct {
 	Age        pol.PasswordAgePolicyDefault
 	Complexity pol.PasswordComplexityPolicyDefault
 	Lockout    pol.PasswordLockoutPolicyDefault
+	OrgIam     org_model.OrgIamPolicy
 }
 
 type Notifications struct {

internal/config/types/setup.go

@@ -16,11 +16,12 @@ type User struct {
 }
 
 type Org struct {
-	Name     string
-	Domain   string
-	Users    []User
-	Owners   []string
-	Projects []Project
+	Name         string
+	Domain       string
+	OrgIamPolicy bool
+	Users        []User
+	Owners       []string
+	Projects     []Project
 }
 
 type Project struct {