Add PlatformIO project setup, local libraries, and PCB Gerber files

- Add platformio.ini for ESP32 DevKit (Arduino framework, espressif32 6.10.0)
- Vendor ArduinoJson, MPU6050_tockn, SCServo, Simple_FOC, and WebSockets
  so a fresh clone builds without downloading dependencies
- Add .gitignore rules for PlatformIO/IDE build artifacts
- Add controller PCB Gerber and drill files

3.Software/libraries/SCServo/SCServo.h

@@ -0,0 +1,14 @@
+/*
+ * SCServo.h
+ * 飞特串行舵机接口
+ * 日期: 2021.3.11
+ * 作者: 
+ */
+
+#ifndef _SCSERVO_H
+#define _SCSERVO_H
+
+#include "SCSCL.h"
+#include "SMS_STS.h"
+
+#endif