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/JsonObject/remove.cpp

@@ -0,0 +1,82 @@
+// ArduinoJson - https://arduinojson.org
+// Copyright © 2014-2023, Benoit BLANCHON
+// MIT License
+
+#include <ArduinoJson.h>
+#include <catch.hpp>
+#include <string>
+
+TEST_CASE("JsonObject::remove()") {
+  DynamicJsonDocument doc(4096);
+  JsonObject obj = doc.to<JsonObject>();
+  obj["a"] = 0;
+  obj["b"] = 1;
+  obj["c"] = 2;
+  std::string result;
+
+  SECTION("remove(key)") {
+    SECTION("Remove first") {
+      obj.remove("a");
+      serializeJson(obj, result);
+      REQUIRE("{\"b\":1,\"c\":2}" == result);
+    }
+
+    SECTION("Remove middle") {
+      obj.remove("b");
+      serializeJson(obj, result);
+      REQUIRE("{\"a\":0,\"c\":2}" == result);
+    }
+
+    SECTION("Remove last") {
+      obj.remove("c");
+      serializeJson(obj, result);
+      REQUIRE("{\"a\":0,\"b\":1}" == result);
+    }
+  }
+
+  SECTION("remove(iterator)") {
+    JsonObject::iterator it = obj.begin();
+
+    SECTION("Remove first") {
+      obj.remove(it);
+      serializeJson(obj, result);
+      REQUIRE("{\"b\":1,\"c\":2}" == result);
+    }
+
+    SECTION("Remove middle") {
+      ++it;
+      obj.remove(it);
+      serializeJson(obj, result);
+      REQUIRE("{\"a\":0,\"c\":2}" == result);
+    }
+
+    SECTION("Remove last") {
+      it += 2;
+      obj.remove(it);
+      serializeJson(obj, result);
+      REQUIRE("{\"a\":0,\"b\":1}" == result);
+    }
+  }
+
+#ifdef HAS_VARIABLE_LENGTH_ARRAY
+  SECTION("key is a vla") {
+    size_t i = 16;
+    char vla[i];
+    strcpy(vla, "b");
+    obj.remove(vla);
+
+    serializeJson(obj, result);
+    REQUIRE("{\"a\":0,\"c\":2}" == result);
+  }
+#endif
+
+  SECTION("remove by key on unbound reference") {
+    JsonObject unboundObject;
+    unboundObject.remove("key");
+  }
+
+  SECTION("remove by iterator on unbound reference") {
+    JsonObject unboundObject;
+    unboundObject.remove(unboundObject.begin());
+  }
+}