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/WebSockets/examples/esp8266/WebSocketServerHooked/emu

@@ -0,0 +1,20 @@
+#!/bin/sh
+
+# linux script to compile&run arduinoWebSockets in a mock environment
+
+if [ -z "$ESP8266ARDUINO" ]; then
+    echo "please set ESP8266ARDUINO env-var to where esp8266/arduino sits"
+    exit 1
+fi
+
+set -e
+
+where=$(pwd)
+
+cd $ESP8266ARDUINO/tests/host/
+
+make -j FORCE32=0 \
+    ULIBDIRS=../../libraries/Hash/:~/dev/proj/arduino/libraries/arduinoWebSockets \
+    ${where}/WebSocketServerHooked
+
+valgrind ./bin/WebSocketServerHooked/WebSocketServerHooked -b "$@"