refactor(v2): init events (#7823)

creates events structures for initial projections and read models

internal/v2/org/aggregate.go

@@ -0,0 +1,22 @@
+package org
+
+import (
+	"context"
+
+	"github.com/zitadel/zitadel/internal/api/authz"
+	"github.com/zitadel/zitadel/internal/v2/eventstore"
+)
+
+const (
+	AggregateType   = "org"
+	eventTypePrefix = AggregateType + "."
+)
+
+func NewAggregate(ctx context.Context, id string) *eventstore.Aggregate {
+	return &eventstore.Aggregate{
+		ID:       id,
+		Type:     AggregateType,
+		Instance: authz.GetInstance(ctx).InstanceID(),
+		Owner:    authz.GetCtxData(ctx).OrgID,
+	}
+}