feat: machine Reset endpoint with asynchronous resource and data cleanup

internal/machine/docker/manager_darwin.go

@@ -12,3 +12,8 @@ import (
 func (m *Manager) EnsureUncloudNetwork(ctx context.Context, subnet netip.Prefix, dnsServer netip.Addr) error {
 	return fmt.Errorf("not supported on Darwin")
 }
+
+// Cleanup is a stub for Darwin.
+func (m *Manager) Cleanup() error {
+	return fmt.Errorf("not supported on Darwin")
+}