fix: rename iam to instance (#3345)

* fix: rename iam command side to instance

* fix: rename iam command side to instance

* fix: rename iam command side to instance

* fix: rename iam command side to instance

* fix: rename orgiampolicy to domain policy

* fix: merge conflicts

* fix: protos

* fix: md files

* implement deprecated org iam policy again

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

internal/repository/instance/aggregate.go

@@ -0,0 +1,30 @@
+package instance
+
+import (
+	"github.com/caos/zitadel/internal/domain"
+	"github.com/caos/zitadel/internal/eventstore"
+)
+
+const (
+	instanceEventTypePrefix = eventstore.EventType("instance.")
+)
+
+const (
+	AggregateType    = "instance"
+	AggregateVersion = "v1"
+)
+
+type Aggregate struct {
+	eventstore.Aggregate
+}
+
+func NewAggregate() *Aggregate {
+	return &Aggregate{
+		Aggregate: eventstore.Aggregate{
+			Type:          AggregateType,
+			Version:       AggregateVersion,
+			ID:            domain.IAMID,
+			ResourceOwner: domain.IAMID,
+		},
+	}
+}