feat: add option to customize python binary for Klipper and Moonraker, add option to not install Moonraker speedups (#671)

Add option to cusomize python binary for klipper and moonraker. Add option to not install moonraker speedups.

default.kiauh.cfg

@@ -13,6 +13,10 @@ repositories:
     https://github.com/Klipper3d/klipper
 
 [moonraker]
+# Moonraker supports two optional Python packages that can be used to reduce its CPU load
+# If set to true, those packages will be installed during the Moonraker installation
+optional_speedups: True
+
 # add custom repositories here, if at least one is given, the first in the list will be used by default
 # otherwise the official repository is used
 #