[ADD][SCRIPT] Batman script

This was shamelessly stolen from the `bat-extras` repository, with a
little modification to call the pager with my wanted default options.

This obviously depends on the `bat` utility.

scripts/batman

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+export MANPAGER='sh -c "col -bx | bat --language man --style grid"'
+export MANROFFOPT='-c'
+export BAT_PAGER="$PAGER $LESS"
+
+command man "$@"
+exit $?