Fix keybindings for M-up and M-down

I’m very used to having M-up and M-down do the same thing as regular up and
down. In fish by default this prints the previous command, with ‘&| less;’ added
on.

fish/.config/fish/config.fish

@@ -10,6 +10,9 @@ function myctl
     systemctl --user $argv
 end
 
+bind \ep up-or-search
+bind \en down-or-search
+
 set -x LESS FXRSi
 set -x EDITOR emacsclient
 set -x DOTNET_CLI_TELEMETRY_OPTOUT true