Add create guest cache template.

builder/squash/tmp/00-create-guest-cache

@@ -0,0 +1,11 @@
+# Calculate exec=/bin/bash
+
+if id guest &>/dev/null
+then
+    ( useradd guest -u 1000 && cl-desktop guest --cache ) &>/dev/null
+    userdel guest &>/dev/null
+else
+    cl-desktop guest --cache &>/dev/null
+fi
+
+return 0

builder/squash/tmp/01-remove-create-script

@@ -0,0 +1 @@
+# Calculate name=00-create-guest-cache append=remove