✨ Chitu3D V9 board (#22401)

Co-authored-by: Scott Lahteine <thinkyhead@users.noreply.github.com>

Marlin/src/pins/stm32f1/pins_CHITU3D_V9.h

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+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2021 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+#define BOARD_INFO_NAME "Chitu3D V9"
+
+#define Z_STOP_PIN                          PA14
+
+#define Z2_ENABLE_PIN                       PF3
+#define Z2_STEP_PIN                         PF5
+#define Z2_DIR_PIN                          PF1
+
+#ifndef FIL_RUNOUT2_PIN
+  #define FIL_RUNOUT2_PIN                   PF13
+#endif
+
+#include "pins_CHITU3D_common.h"