Rename "container" to "image"

- Updated `wwctl upgrade` to handle updates
- Maintained `.Container` and `.ContainerName` in tstruct
- Added `ContainerName()` methods to node and profile objects
- Added `--container`, `-C` aliases to wwctl commands (`<node|profile> <add|set>`)
- Added `wwctl container` alias
- Added support for `container_exit.sh` if `image_exit.sh` is not found

Signed-off-by: Jonathon Anderson <janderson@ciq.com>

internal/app/wwctl/image/list/root.go

@@ -0,0 +1,32 @@
+package list
+
+import (
+	"github.com/spf13/cobra"
+)
+
+type variables struct {
+	full       bool
+	size       bool
+	kernel     bool
+	chroot     bool
+	compressed bool
+}
+
+// GetRootCommand returns the root cobra.Command for the application.
+func GetCommand() *cobra.Command {
+	vars := variables{}
+	baseCmd := &cobra.Command{
+		DisableFlagsInUseLine: true,
+		Use:                   "list [OPTIONS]",
+		Short:                 "List imported Warewulf images",
+		Long:                  "This command will show you the images that are imported into Warewulf.",
+		RunE:                  CobraRunE(&vars),
+		Aliases:               []string{"ls"},
+	}
+	baseCmd.PersistentFlags().BoolVarP(&vars.full, "long", "l", false, "show all")
+	baseCmd.PersistentFlags().BoolVarP(&vars.kernel, "kernel", "k", false, "show kernel version")
+	baseCmd.PersistentFlags().BoolVarP(&vars.size, "size", "s", false, "show size information")
+	baseCmd.PersistentFlags().BoolVarP(&vars.chroot, "chroot", "c", false, "show size of chroot")
+	baseCmd.PersistentFlags().BoolVar(&vars.compressed, "compressed", false, "show size of the compressed image")
+	return baseCmd
+}