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.json

@@ -0,0 +1,24 @@
+{
+  "name": "ArduinoJson",
+  "keywords": "json, rest, http, web",
+  "description": "A simple and efficient JSON library for embedded C++. 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.",
+  "homepage": "https://arduinojson.org/?utm_source=meta&utm_medium=library.json",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/bblanchon/ArduinoJson.git"
+  },
+  "version": "6.21.0",
+  "authors": {
+    "name": "Benoit Blanchon",
+    "url": "https://blog.benoitblanchon.fr"
+  },
+  "exclude": [
+    ".github",
+    "extras"
+  ],
+  "frameworks": "*",
+  "platforms": "*",
+  "build": {
+    "libArchive": false
+  }
+}