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/examples/STSCL/CalibrationOfs/CalibrationOfs.ino

@@ -0,0 +1,25 @@
+/*
+set the current position as middle.
+*/
+
+#include <SCServo.h>
+
+SMS_STS st;
+
+// the uart used to control servos.
+// GPIO 18 - S_RXD, GPIO 19 - S_TXD, as default.
+#define S_RXD 18
+#define S_TXD 19
+
+void setup()
+{
+  Serial1.begin(1000000, SERIAL_8N1, S_RXD, S_TXD);
+  st.pSerial = &Serial1;
+  delay(1000);
+}
+
+void loop()
+{
+  st.CalibrationOfs(1);
+  while(1);
+}