Add Marlin firmware. Has initial configuration for CoreXY and 1 servo.

Update CAD file with improved clearances for Pilot G2 cartridge clearances after first print.

Marlin Firmware/buildroot/tests/mks_robin_maple

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+#
+# Build tests for MKS Robin with LibMaple STM32F1 HAL
+# (STM32F1 genericSTM32F103ZE)
+#
+
+# exit on first failure
+set -e
+
+use_example_configs Mks/Robin
+exec_test $1 $2 "MKS Robin config (FSMC Color UI)" "$3"
+
+#
+# MKS Robin LVGL FSMC
+#
+use_example_configs Mks/Robin
+opt_disable TFT_CLASSIC_UI TFT_COLOR_UI TOUCH_SCREEN TFT_RES_320x240
+opt_enable TFT_LVGL_UI TFT_RES_480x320
+exec_test $1 $2 "MKS Robin nano v1.2 LVGL FSMC" "$3"
+
+# cleanup
+restore_configs