fix: multiple setup steps (#773)

* fix: multiple setup steps

* fix: test set up started

* fix: possible nil pointers in setup

* fix: validate executed step

internal/iam/model/iam.go

@@ -4,12 +4,22 @@ import (
 	es_models "github.com/caos/zitadel/internal/eventstore/models"
 )
 
+type Step int
+
+const (
+	Step1 Step = iota + 1
+	//TODO: label policy
+	// Step2
+	//StepCount marks the the length of possible steps (StepCount-1 == last possible step)
+	StepCount
+)
+
 type IAM struct {
 	es_models.ObjectRoot
 	GlobalOrgID        string
 	IAMProjectID       string
-	SetUpDone          bool
-	SetUpStarted       bool
+	SetUpDone          Step
+	SetUpStarted       Step
 	Members            []*IAMMember
 	IDPs               []*IDPConfig
 	DefaultLoginPolicy *LoginPolicy