refactor: move api, client, compose packages to pkg

pkg/client/cluster.go

@@ -0,0 +1,30 @@
+package client
+
+import (
+	"context"
+	"github.com/psviderski/uncloud/internal/machine/api/pb"
+	"google.golang.org/protobuf/types/known/emptypb"
+)
+
+func (cli *Client) InspectMachine(ctx context.Context, id string) (*pb.MachineMember, error) {
+	machines, err := cli.ListMachines(ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	for _, m := range machines {
+		if m.Machine.Id == id || m.Machine.Name == id {
+			return m, nil
+		}
+	}
+
+	return nil, ErrNotFound
+}
+
+func (cli *Client) ListMachines(ctx context.Context) ([]*pb.MachineMember, error) {
+	resp, err := cli.ClusterClient.ListMachines(ctx, &emptypb.Empty{})
+	if err != nil {
+		return nil, err
+	}
+	return resp.Machines, nil
+}