Convert all projects to PlatformIO

- JC3636W518 sketches: pioarduino 51.03.05 (Arduino core 3.0.5), ESP32-S3
  16MB QIO / OPI PSRAM, vendor libs via lib_extra_dirs, per-project lv_conf.h
- display_gif_embedded uses default_16MB.csv (firmware 3.4 MB > huge_app)
- elm327_wifi_bridge: espressif32 6.10.0 on esp32dev, pinned lib_deps
- elmulator: library in lib/, one env per example, duplicate copies removed
- .ino -> src/main.cpp, headers/lv_conf.h -> include/

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

10-OBD-Display-2024/elmulator/lib/ELMulator/src/ATCommands.h

@@ -0,0 +1,65 @@
+#ifndef ELMulator_ATCommands_h
+#define ELMulator_ATCommands_h
+
+#include <Arduino.h>
+#include "definitions.h"
+#if USE_WIFI
+#include "OBDWiFiComm.h"
+#else
+#include "OBDSerialComm.h"
+#endif
+
+class ATCommands
+{
+
+public:
+#if USE_WIFI
+    ATCommands(OBDWiFiComm *connection);
+#else
+    ATCommands(OBDSerialComm *connection);
+#endif
+    ~ATCommands();
+
+    bool process(const String &string);
+
+private:
+    // Variables
+#if USE_WIFI
+    OBDWiFiComm *connection;
+#else
+    OBDSerialComm *connection;
+#endif
+    void ATD();
+
+    void ATZ();
+
+    void ATI();
+
+    void ATEx(String &x);
+
+    void ATMx(String &x);
+
+    void ATLx(String &x);
+
+    void ATSx(String &x);
+
+    void ATHx(String &x);
+
+    void ATSPx(String &x);
+
+    void ATATx(String &cmd);
+
+    void ATPC();
+
+    void ATDPN();
+
+    void ATDESC();
+
+    void ATRV();
+
+    void processCommand(const String &command);
+
+    bool isATCommand(const String &command);
+};
+
+#endif