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>

2-Program Example/Demo_Arduino/sd/include/pincfg.h

@@ -0,0 +1,38 @@
+#ifndef _PINCFG_H_
+#define _PINCFG_H_
+
+#define TFT_BLK 15
+
+#define TFT_RST 47
+#define TFT_CS 10
+#define TFT_SCK 9
+#define TFT_SDA0 11
+#define TFT_SDA1 12
+#define TFT_SDA2 13
+#define TFT_SDA3 14
+
+#define BTN_PIN 0
+
+#define TOUCH_PIN_NUM_I2C_SCL 8
+#define TOUCH_PIN_NUM_I2C_SDA 7
+#define TOUCH_PIN_NUM_INT 41
+#define TOUCH_PIN_NUM_RST 40
+
+#define SD_MMC_D0_PIN 2
+#define SD_MMC_D1_PIN 1
+#define SD_MMC_D2_PIN 6
+#define SD_MMC_D3_PIN 5
+#define SD_MMC_CLK_PIN 3
+#define SD_MMC_CMD_PIN 4
+
+#define AUDIO_I2S_MCK_IO -1 // MCK
+#define AUDIO_I2S_BCK_IO 18 // BCK
+#define AUDIO_I2S_WS_IO 16  // LCK
+#define AUDIO_I2S_DO_IO 17  // DIN
+#define AUDIO_MUTE_PIN 48   // 低电平静音
+
+#define MIC_I2S_WS 45
+#define MIC_I2S_SD 46
+#define MIC_I2S_SCK 42
+
+#endif