feat: allow klipper installation with python3

Signed-off-by: Dominik Willner th33xitus@gmail.com

scripts/ui/install_menu.sh

@@ -11,7 +11,7 @@
 
 set -e
 
-install_ui(){
+function install_ui(){
   top_border
   echo -e "|     ${green}~~~~~~~~~~~ [ Installation Menu ] ~~~~~~~~~~~${white}     | "
   hr
@@ -32,13 +32,16 @@ install_ui(){
   back_footer
 }
 
-install_menu(){
-  do_action "" "install_ui"
+function install_menu(){
+  clear && print_header
+  install_ui
+
   while true; do
     read -p "${cyan}Perform action:${white} " action; echo
-    case "$action" in
-      1)
-        do_action "klipper_setup_dialog" "install_ui";;
+    case "${action}" in
+      1)clear && print_header
+        select_klipper_python_version
+        install_ui;;
       2)
         do_action "moonraker_setup_dialog" "install_ui";;
       3)
@@ -63,3 +66,33 @@ install_menu(){
   done
   install_menu
 }
+
+function select_klipper_python_version(){
+  top_border
+  echo -e "| Please select the preferred Python version.           | "
+  echo -e "| The recommended version is Python 2.7.                | "
+  blank_line
+  echo -e "| Installing Klipper with Python 3 is officially not    | "
+  echo -e "| recommended and should be considered as experimental. | "
+  hr
+  echo -e "|  1) [Python 2.7]  (recommended)                       | "
+  echo -e "|  2) [Python 3.x]  ${yellow}(experimental)${white}                      | "
+  back_footer
+  while true; do
+    read -p "${cyan}###### Select Python version:${white} " action; echo
+    case "${action}" in
+      1)
+        select_msg "Python 2.7"
+        klipper_setup_dialog "python2"
+        break;;
+      2)
+        select_msg "Python 3.x"
+        klipper_setup_dialog "python3"
+        break;;
+      B|b)
+        clear; install_menu; break;;
+      *)
+        error_msg "Invalid Input!\n";;
+    esac
+  done
+}