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/ArduinoJson/library.properties

@@ -0,0 +1,11 @@
+name=ArduinoJson
+version=6.21.0
+author=Benoit Blanchon <blog.benoitblanchon.fr>
+maintainer=Benoit Blanchon <blog.benoitblanchon.fr>
+sentence=A simple and efficient JSON library for embedded C++.
+paragraph=ArduinoJson supports ✔ serialization, ✔ deserialization, ✔ MessagePack, ✔ fixed allocation, ✔ zero-copy, ✔ streams, ✔ filtering, and more. It is the most popular Arduino library on GitHub ❤❤❤❤❤. Check out arduinojson.org for a comprehensive documentation.
+category=Data Processing
+url=https://arduinojson.org/?utm_source=meta&utm_medium=library.properties
+architectures=*
+repository=https://github.com/bblanchon/ArduinoJson.git
+license=MIT