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/esp32

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+#
+# Build tests for ESP32
+#
+
+# exit on first failure
+set -e
+
+#
+# Build with the default configurations
+#
+restore_configs
+opt_set MOTHERBOARD BOARD_ESPRESSIF_ESP32 TX_BUFFER_SIZE 64 \
+        WIFI_SSID '"ssid"' WIFI_PWD '"password"'
+opt_enable WIFISUPPORT WEBSUPPORT GCODE_MACROS BAUD_RATE_GCODE M115_GEOMETRY_REPORT REPETIER_GCODE_M360
+exec_test $1 $2 "ESP32 with WIFISUPPORT and WEBSUPPORT" "$3"
+
+#
+# Build with TMC drivers using hardware serial
+#
+restore_configs
+opt_set MOTHERBOARD BOARD_ESPRESSIF_ESP32 \
+        X_DRIVER_TYPE TMC2209 Y_DRIVER_TYPE TMC2208 Z_DRIVER_TYPE TMC2209 E0_DRIVER_TYPE TMC2209 \
+        X_HARDWARE_SERIAL Serial1 Y_HARDWARE_SERIAL Serial1 Z_HARDWARE_SERIAL Serial1 E0_HARDWARE_SERIAL Serial1 \
+        X_SLAVE_ADDRESS 0 Y_SLAVE_ADDRESS 1 Z_SLAVE_ADDRESS 2 E0_SLAVE_ADDRESS 3
+opt_enable HOTEND_IDLE_TIMEOUT SOFTWARE_DRIVER_ENABLE
+exec_test $1 $2 "ESP32, TMC HW Serial, Hotend Idle" "$3"
+
+# cleanup
+restore_configs