✨ MKS Monster8 board (#22455)

Author: mks-viva

Marlin/src/core/boards.h

@@ -385,10 +385,10 @@
 #define BOARD_MKS_ROBIN2              4224  // MKS_ROBIN2 (STM32F407ZE)
 #define BOARD_MKS_ROBIN_PRO_V2        4225  // MKS Robin Pro V2 (STM32F407VE)
 #define BOARD_MKS_ROBIN_NANO_V3       4226  // MKS Robin Nano V3 (STM32F407VG)
-#define BOARD_ANET_ET4                4227  // ANET ET4 V1.x (STM32F407VGT6)
-#define BOARD_ANET_ET4P               4228  // ANET ET4P V1.x (STM32F407VGT6)
-#define BOARD_FYSETC_CHEETAH_V20      4229  // FYSETC Cheetah V2.0
-
+#define BOARD_MKS_MONSTER8            4227  // MKS Monster8 (STM32F407VGT6)
+#define BOARD_ANET_ET4                4228  // ANET ET4 V1.x (STM32F407VGT6)
+#define BOARD_ANET_ET4P               4229  // ANET ET4P V1.x (STM32F407VGT6)
+#define BOARD_FYSETC_CHEETAH_V20      4230  // FYSETC Cheetah V2.0
 
 //
 // ARM Cortex M7

Marlin/src/pins/lpc1769/pins_BTT_SKR_E3_TURBO.h

@@ -204,8 +204,8 @@
 #if ENABLED(DWIN_CREALITY_LCD)
   #error "DWIN_CREALITY_LCD requires a custom cable with TX = P0_15, RX = P0_16. Comment out this line to continue."
 
- /** 
-  *          Ender 3 V2 display                       SKR E3 Turbo (EXP1)                Ender 3 V2 display --> SKR E3 Turbo 
+ /**
+  *          Ender 3 V2 display                       SKR E3 Turbo (EXP1)                Ender 3 V2 display --> SKR E3 Turbo
   *                ______                                     ______                                  RX  8 -->  5  P0_15
   *            5V | 1  2 | GND                            5V | 1  2 | GND                             TX  7 -->  9  P0_16
   *   (BTN_E1)  A | 3  4 | B   (BTN_E2)       (LCD_EN) P0_18 | 3  4 | P0_17 (LCD_RS)              BEEPER  5 --> 10  P2_08

Marlin/src/pins/pins.h

@@ -631,6 +631,8 @@
   #include "stm32f4/pins_ANET_ET4P.h"           // STM32F4                                env:Anet_ET4_OpenBLT
 #elif MB(FYSETC_CHEETAH_V20)
   #include "stm32f4/pins_FYSETC_CHEETAH_V20.h"  // STM32F4                                env:FYSETC_CHEETAH_V20
+#elif MB(MKS_MONSTER8)
+  #include "stm32f4/pins_MKS_MONSTER8.h"        // STM32F4                                env:mks_monster8 env:mks_monster8_usb_flash_drive env:mks_monster8_usb_flash_drive_msc
 
 //
 // ARM Cortex M7