feat(images): gRPC client and server for ListImages

pkg/api/image.go

@@ -3,6 +3,7 @@ package api
 import (
 	"github.com/distribution/reference"
 	"github.com/docker/docker/api/types"
+	"github.com/docker/docker/api/types/image"
 	v1 "github.com/opencontainers/image-spec/specs-go/v1"
 	"github.com/psviderski/uncloud/internal/machine/api/pb"
 )
@@ -12,6 +13,23 @@ type MachineImage struct {
 	Image    types.ImageInspect
 }
 
+// MachineImages represents images present on a particular machine.
+type MachineImages struct {
+	Metadata *pb.Metadata
+	// DockerImages is a list of images present in the Docker internal image store.
+	// It may be empty if Docker uses the containerd image store directly (containerd-snapshotter feature).
+	DockerImages []image.Summary
+	// ContainerdImages is a list of images present in the containerd image store.
+	ContainerdImages []image.Summary
+}
+
+// ImageFilter defines criteria to filter images in ListImages.
+type ImageFilter struct {
+	// Machines filters images to those present on the specified machines (names or IDs).
+	// If empty, it matches images on all machines.
+	Machines []string
+}
+
 // MachineRemoteImage represents an image in a remote registry fetched by a particular machine.
 type MachineRemoteImage struct {
 	Metadata *pb.Metadata