quadlet: add cat alias for print

Add new alias `podman quadlet cat` to `podman quadlet print`
to align Podman's quadlet CLI with systemd conventions.

Fixes: https://github.com/containers/podman/issues/27296

Signed-off-by: Artem Sierikov <sierikov@pm.me>

cmd/podman/quadlet/print.go

@@ -17,6 +17,7 @@ var (
 		Long:              quadletPrintDescription,
 		RunE:              print,
 		ValidArgsFunction: common.AutocompleteQuadlets,
+		Aliases:           []string{"cat"},
 		Args:              cobra.ExactArgs(1),
 		Example: `podman quadlet print myquadlet.container
 podman quadlet print mypod.pod