Add USART2 support and modify system clock configuration

- Implemented USART2 initialization and interrupt handling.
- Added a function to send data to the server via USART2.
- Updated the main application to utilize USART2 for communication.
- Changed system clock configuration to use HSE and PLL for higher frequency.
- Adjusted SPI1 baud rate prescaler for improved performance.
- Enhanced LED control logic based on RFID card detection.
- Updated project configuration to reflect new USART2 settings.

Core/Inc/main.h

@@ -64,6 +64,16 @@ void Error_Handler(void);
 #define PN532_RST_GPIO_Port GPIOB
 #define PN532_REQ_Pin GPIO_PIN_1
 #define PN532_REQ_GPIO_Port GPIOB
+#define RED_LED_Pin GPIO_PIN_12
+#define RED_LED_GPIO_Port GPIOB
+#define ORANGE_LED_Pin GPIO_PIN_13
+#define ORANGE_LED_GPIO_Port GPIOB
+#define GREEN_LED_Pin GPIO_PIN_14
+#define GREEN_LED_GPIO_Port GPIOB
+#define DEBUG_TXD_Pin GPIO_PIN_9
+#define DEBUG_TXD_GPIO_Port GPIOA
+#define DEBUG_RXD_Pin GPIO_PIN_10
+#define DEBUG_RXD_GPIO_Port GPIOA
 
 /* USER CODE BEGIN Private defines */