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/imprt/main.go

@@ -0,0 +1,32 @@
+package imprt
+
+import (
+	"github.com/spf13/cobra"
+	apiimage "github.com/warewulf/warewulf/internal/pkg/api/image"
+	"github.com/warewulf/warewulf/internal/pkg/api/routes/wwapiv1"
+)
+
+func CobraRunE(cmd *cobra.Command, args []string) (err error) {
+
+	// Shim in a name if none given.
+	name := ""
+	if len(args) == 2 {
+		name = args[1]
+	}
+
+	cip := &wwapiv1.ImageImportParameter{
+		Source:      args[0],
+		Name:        name,
+		Force:       SetForce,
+		Update:      SetUpdate,
+		Build:       SetBuild,
+		SyncUser:    SyncUser,
+		OciNoHttps:  OciNoHttps,
+		OciUsername: OciUsername,
+		OciPassword: OciPassword,
+		Platform:    Platform,
+	}
+
+	_, err = apiimage.ImageImport(cip)
+	return
+}