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/extras/scripts/build-arduino-package.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+set -eu
+
+INPUT=$1
+OUTPUT=$2
+
+cd "$INPUT"
+
+# remove existing file
+rm -f "$OUTPUT"
+
+# create zip
+7z a "$OUTPUT" \
+	-xr!.vs \
+	CHANGELOG.md \
+	examples \
+	src \
+	keywords.txt \
+	library.properties \
+	LICENSE.txt \
+	README.md \
+	ArduinoJson.h