neomutt: Add ics to calendar by printing it

By invoking 'print' for ics files from neomutt we can simply
add it to our local calendar directly from the interface.
Neat little 'cheat' to provide custom functions for specific
file types.

office/.config/neomutt/mailcap

@@ -6,8 +6,8 @@ text/html; render-prettyhtml %s; nametemplate=%s.html; copiousoutput;
 text/plain; $EDITOR %s ;
 
 # show calendar invites
-text/calendar; mutt-ics; copiousoutput
-application/ics; mutt-ics; copiousoutput
+text/calendar; mutt-ics; description=ics details; copiousoutput; print=khal import %s; needsterminal
+application/ics; mutt-ics; description=ics details; copiousoutput; print=khal import %s; needsterminal
 
 # open images externally
 image/*; imv %s ;