ext: Remove in favor of atool (#1013)

* ext: Give the ability to extract multiple files and wildcards

* Variable renaming

* Make user get prompted if extracted file overwrites another file

* Deleted ext

We have atool

* Replace ext with aunpack

.config/lf/lfrc

@@ -36,7 +36,7 @@ cmd extract ${{
 	printf "%s\n\t" "$fx"
 	printf "extract?[y/N]"
 	read ans
-	[ $ans = "y" ] && ext $fx
+	[ $ans = "y" ] && aunpack $fx
 }}
 
 cmd delete ${{