Add CYD BLE foundation with NimBLE Nordic UART.

Reusable ble_core (+ optional LVGL ble_ui), flashable firmware/cyd, aligned with wifitest as a base feature.

Co-authored-by: Cursor <cursoragent@cursor.com>

include/pins.h

@@ -0,0 +1,16 @@
+#pragma once
+
+// CYD ESP32-2432S028R
+
+#define TFT_BL_PIN 21
+
+#define CYD_TOUCH_IRQ  36
+#define CYD_TOUCH_MOSI 32
+#define CYD_TOUCH_MISO 39
+#define CYD_TOUCH_CLK  25
+#define CYD_TOUCH_CS   33
+
+#define SCREEN_WIDTH  240
+#define SCREEN_HEIGHT 320
+#define UI_HOR_RES    320
+#define UI_VER_RES    240