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/LERDGEK

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+#
+# Build tests for LERDGEK environment
+#
+
+# exit on first failure
+set -e
+
+#
+# Build with the typical configuration
+#
+restore_configs
+opt_set MOTHERBOARD BOARD_LERDGE_K SERIAL_PORT 1
+opt_enable TFT_GENERIC TFT_INTERFACE_FSMC TFT_COLOR_UI
+exec_test $1 $2 "LERDGE K with Generic FSMC TFT with ColorUI" "$3"
+
+# clean up
+restore_configs