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

docs/source/markdown/podman-quadlet-print.1.md

@@ -6,12 +6,15 @@ podman\-quadlet\-print - Display the contents of a quadlet
 ## SYNOPSIS
 **podman quadlet print** *quadlet*
 
+**podman quadlet cat** *quadlet*
+
 ## DESCRIPTION
 
 Print the contents of a Quadlet, displaying the file including all comments.
 
 ## EXAMPLES
 
+Using `podman quadlet print` to display the contents of a quadlet named `myquadlet.container`:
 ```
 $ podman quadlet print myquadlet.container
 [Container]

test/system/253-podman-quadlet.bats

@@ -75,6 +75,10 @@ EOF
     run_podman quadlet print alpine-quadlet.container
     assert "$output" == "$(<$quadlet_file)" "print output matches quadlet file"
 
+    # Test quadlet cat
+    run_podman quadlet cat alpine-quadlet.container
+    assert "$output" == "$(<$quadlet_file)" "cat output matches quadlet file"
+
     # Test quadlet rm
     run_podman quadlet rm alpine-quadlet.container
     # Verify remove output contains the quadlet name on a single line