feat: 集成 EasyLogger 并更新 UART DMA 回调

- 集成 EasyLogger，增强日志功能。
- 更新 UART DMA 回调以使用 EasyLogger 记录日志。
- 重新格式化 README.md，提升可读性和清晰度。
- 添加新的 CMSIS DSP 和 FreeRTOS 源文件。
- 更新 CMake 配置以包含 EasyLogger 源文件。

此提交改进了日志功能，为后续开发做好了准备。

Core/Inc/stm32f1xx_it.h

@@ -0,0 +1,69 @@
+/* USER CODE BEGIN Header */
+/**
+  ******************************************************************************
+  * @file    stm32f1xx_it.h
+  * @brief   This file contains the headers of the interrupt handlers.
+  ******************************************************************************
+  * @attention
+  *
+  * Copyright (c) 2026 STMicroelectronics.
+  * All rights reserved.
+  *
+  * This software is licensed under terms that can be found in the LICENSE file
+  * in the root directory of this software component.
+  * If no LICENSE file comes with this software, it is provided AS-IS.
+  *
+  ******************************************************************************
+  */
+/* USER CODE END Header */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __STM32F1xx_IT_H
+#define __STM32F1xx_IT_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Private includes ----------------------------------------------------------*/
+/* USER CODE BEGIN Includes */
+
+/* USER CODE END Includes */
+
+/* Exported types ------------------------------------------------------------*/
+/* USER CODE BEGIN ET */
+
+/* USER CODE END ET */
+
+/* Exported constants --------------------------------------------------------*/
+/* USER CODE BEGIN EC */
+
+/* USER CODE END EC */
+
+/* Exported macro ------------------------------------------------------------*/
+/* USER CODE BEGIN EM */
+
+/* USER CODE END EM */
+
+/* Exported functions prototypes ---------------------------------------------*/
+void NMI_Handler(void);
+void HardFault_Handler(void);
+void MemManage_Handler(void);
+void BusFault_Handler(void);
+void UsageFault_Handler(void);
+void DebugMon_Handler(void);
+void DMA1_Channel4_IRQHandler(void);
+void DMA1_Channel5_IRQHandler(void);
+void DMA1_Channel7_IRQHandler(void);
+void USART1_IRQHandler(void);
+void USART2_IRQHandler(void);
+void TIM8_UP_IRQHandler(void);
+/* USER CODE BEGIN EFP */
+
+/* USER CODE END EFP */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __STM32F1xx_IT_H */