Add example recipes to build a single image

Sample recipes with new recipe action

Fixes: APERTIS-5675

apertis-image-sdk.yaml

@@ -14,14 +14,18 @@
 {{ $sampleappscheckout := or .sampleappscheckout "disabled" }}
 {{ $devrootpack := or .devrootpack "disabled" }}
 
+{{- $unpack := or .unpack "true" }}
+
 architecture: {{ $architecture }}
 
 actions:
 
+{{- if eq $unpack "true" }}
   - action: unpack
     description: Unpack {{ $ospack }}
     compression: gz
     file: {{ $ospack }}.tar.gz
+{{- end }}
 
   # Add multimedia demo pack
   # Provide URL via '-t demopack:"https://images.apertis.org/media/multimedia-demo.tar.gz"'