chore: move the go code into a subfolder

apps/api/internal/command/cache.go

@@ -0,0 +1,21 @@
+package command
+
+import (
+	"context"
+
+	"github.com/zitadel/zitadel/internal/cache"
+	"github.com/zitadel/zitadel/internal/cache/connector"
+)
+
+type Caches struct {
+	milestones cache.Cache[milestoneIndex, string, *MilestonesReached]
+}
+
+func startCaches(background context.Context, connectors connector.Connectors) (_ *Caches, err error) {
+	caches := new(Caches)
+	caches.milestones, err = connector.StartCache[milestoneIndex, string, *MilestonesReached](background, []milestoneIndex{milestoneIndexInstanceID}, cache.PurposeMilestones, connectors.Config.Milestones, connectors)
+	if err != nil {
+		return nil, err
+	}
+	return caches, nil
+}