moving config to default_config and adding in 3d models for the macropad case itself

macropad_os/app_utils/helpers.py

@@ -0,0 +1,9 @@
+def clamp(num, min_value, max_value):
+   return max(min(num, max_value), min_value)
+
+
+def rgb_from_int(rgb):
+    blue = rgb & 255
+    green = (rgb >> 8) & 255
+    red = (rgb >> 16) & 255
+    return red, green, blue