Unbreak SAMD51 by deferring imports to runtime in the entrypoint (ref #52)

user_keymaps/kdb424/handwire_planck_featherm4.py

@@ -1,5 +1,5 @@
 from kmk.consts import DiodeOrientation, UnicodeModes
-from kmk.entrypoints.handwire.feather_m4_express import main
+from kmk.entrypoints.handwire.circuitpython_samd51 import main
 from kmk.keycodes import KC
 from kmk.macros.simple import send_string
 from kmk.macros.unicode import unicode_string_sequence

user_keymaps/klardotsh/feather_m4_express/fourfour.py

@@ -1,5 +1,5 @@
 from kmk.consts import DiodeOrientation, UnicodeModes
-from kmk.entrypoints.handwire.feather_m4_express import main
+from kmk.entrypoints.handwire.circuitpython_samd51 import main
 from kmk.firmware import Firmware
 from kmk.keycodes import KC
 from kmk.macros.simple import send_string, simple_key_sequence

user_keymaps/klardotsh/itsybitsy_m4_express/threethree.py

@@ -1,5 +1,5 @@
 from kmk.consts import DiodeOrientation, UnicodeModes
-from kmk.entrypoints.handwire.itsybitsy_m4_express import main
+from kmk.entrypoints.handwire.circuitpython_samd51 import main
 from kmk.firmware import Firmware
 from kmk.keycodes import KC
 from kmk.macros.rotary_encoder import VolumeRotaryEncoder