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/CMakeLists.txt

@@ -0,0 +1,25 @@
+# ArduinoJson - https://arduinojson.org
+# Copyright © 2014-2023, Benoit BLANCHON
+# MIT License
+
+cmake_minimum_required(VERSION 3.15)
+
+if(ESP_PLATFORM)
+	# Build ArduinoJson as an ESP-IDF component
+	idf_component_register(INCLUDE_DIRS src)
+	return()
+endif()
+
+project(ArduinoJson VERSION 6.21.0)
+
+if(CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME)
+	include(CTest)
+endif()
+
+add_subdirectory(src)
+
+if(CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME AND BUILD_TESTING)
+	include(extras/CompileOptions.cmake)
+	add_subdirectory(extras/tests)
+	add_subdirectory(extras/fuzzing)
+endif()