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/tests/Misc/weird_strcmp.hpp

@@ -0,0 +1,31 @@
+// ArduinoJson - https://arduinojson.org
+// Copyright © 2014-2023, Benoit BLANCHON
+// MIT License
+
+#include <ArduinoJson/Namespace.hpp>
+
+#include <string.h>  // strcmp, strncmp
+
+// Issue #1198: strcmp() implementation that returns a value larger than 8-bit
+
+ARDUINOJSON_BEGIN_PRIVATE_NAMESPACE
+
+int strcmp(const char* a, const char* b) {
+  int result = ::strcmp(a, b);
+  if (result > 0)
+    return 2147483647;
+  if (result < 0)
+    return -214748364;
+  return 0;
+}
+
+int strncmp(const char* a, const char* b, size_t n) {
+  int result = ::strncmp(a, b, n);
+  if (result > 0)
+    return 2147483647;
+  if (result < 0)
+    return -214748364;
+  return 0;
+}
+
+ARDUINOJSON_END_PRIVATE_NAMESPACE