vifm: Make visidata/xsv default csv opener viewer

Make visidata the default program used to open csv files,
and xsv the default previewer since it displays it in nicer columns than
just the default viewer.

vifm/.config/vifm/vifmrc

@@ -456,6 +456,14 @@ filextype *.ora
         \ {Edit in MyPaint}
         \ mypaint %f,
 
+" tabular data
+filextype *.csv
+        \ {Open with visidata}
+        \ vd %f,
+fileviewer *.csv
+        \ xsv sample 100 %c | xsv table -c8 -p1 -w1,
+        " \ {cat %c | sed -e 's/,,/, ,/g' | column -s, -t | less -#5 -N -S; }
+
 " Mindmap
 filextype *.vym
         \ {Open with VYM}