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/JsonArray/nesting.cpp

@@ -0,0 +1,35 @@
+// ArduinoJson - https://arduinojson.org
+// Copyright © 2014-2023, Benoit BLANCHON
+// MIT License
+
+#include <ArduinoJson.h>
+#include <catch.hpp>
+
+TEST_CASE("JsonArray::nesting()") {
+  DynamicJsonDocument doc(4096);
+  JsonArray arr = doc.to<JsonArray>();
+
+  SECTION("return 0 if uninitialized") {
+    JsonArray unitialized;
+    REQUIRE(unitialized.nesting() == 0);
+  }
+
+  SECTION("returns 1 for empty array") {
+    REQUIRE(arr.nesting() == 1);
+  }
+
+  SECTION("returns 1 for flat array") {
+    arr.add("hello");
+    REQUIRE(arr.nesting() == 1);
+  }
+
+  SECTION("returns 2 with nested array") {
+    arr.createNestedArray();
+    REQUIRE(arr.nesting() == 2);
+  }
+
+  SECTION("returns 2 with nested object") {
+    arr.createNestedObject();
+    REQUIRE(arr.nesting() == 2);
+  }
+}