chore: move the go code into a subfolder

apps/api/internal/v2/projection/highest_position.go

@@ -0,0 +1,15 @@
+package projection
+
+import (
+	"github.com/zitadel/zitadel/internal/v2/eventstore"
+)
+
+type HighestPosition eventstore.GlobalPosition
+
+var _ eventstore.Reducer = (*HighestPosition)(nil)
+
+// Reduce implements eventstore.Reducer.
+func (h *HighestPosition) Reduce(events ...*eventstore.StorageEvent) error {
+	*h = HighestPosition(events[len(events)-1].Position)
+	return nil
+}