Switch from Kitty to Alacritty

- Switch terminal from kitty to alacritty
- Remove kitty ssh kitten alias
- Add configuration file for alacritty to README
- Instead of killing xmonad, send notification to use xmonad keybinding for logout

.scripts/session.sh

@@ -39,7 +39,7 @@ main() {
             help_menu
             ;;
         --logout)
-            pkill xmonad
+            notify-send -t 0 "Session Control" "Press M-S-q to exit xmonad"
             ;;
         --lock)
             light-locker-command --lock