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/get-release-page.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+set -eu
+
+VERSION="$1"
+CHANGELOG="$2"
+FRONTMATTER="$3"
+
+cat << END
+---
+branch: v6
+version: $VERSION
+date: '$(date +'%Y-%m-%d')'
+$(cat "$FRONTMATTER")
+---
+
+$(awk '/\* /{ FOUND=1; print; next } { if (FOUND) exit}' "$CHANGELOG")
+END