Separate old OBD display project from vendor demo folder

- Move user sketches to 10-OBD-Display-2024/, one folder per sketch
- Keep 2-Program Example/Demo_Arduino vendor-only, single docs/ copy
- Remove duplicate screenshots/instructions and ELMulator zip
- Archive broken LVGL 9 attempt

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

10-OBD-Display-2024/elmulator/examples/ESP32_Custom_ELMulator/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