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>

platformio.ini

@@ -0,0 +1,57 @@
+; CYD ESP32-2432S028 — BLE 基础（NimBLE + Nordic UART + LVGL 状态页）
+[env:cyd]
+platform = espressif32
+board = esp32dev
+framework = arduino
+monitor_speed = 460800
+upload_speed = 460800
+; LVGL+NimBLE 已近默认 1.2MB 上限；给后续 WiFi 共存留空间（约 1.9MB APP）
+board_build.partitions = min_spiffs.csv
+
+lib_deps =
+  bodmer/TFT_eSPI@^2.5.43
+  lvgl/lvgl@9.2.2
+  h2zero/NimBLE-Arduino@^2.3.2
+
+build_flags =
+  -DCORE_DEBUG_LEVEL=0
+  -DUSER_SETUP_LOADED=1
+  -DILI9341_2_DRIVER=1
+  -DTFT_WIDTH=240
+  -DTFT_HEIGHT=320
+  -DTFT_MISO=12
+  -DTFT_MOSI=13
+  -DTFT_SCLK=14
+  -DTFT_CS=15
+  -DTFT_DC=2
+  -DTFT_RST=-1
+  -DTFT_BL=21
+  -DTFT_BACKLIGHT_ON=HIGH
+  -DTOUCH_CS=-1
+  -DLOAD_GLCD=1
+  -DLOAD_FONT2=1
+  -DLOAD_FONT4=1
+  -DLOAD_FONT6=1
+  -DLOAD_FONT7=1
+  -DLOAD_FONT8=1
+  -DLOAD_GFXFF=1
+  -DSMOOTH_FONT=1
+  -DSPI_FREQUENCY=40000000
+  -DSPI_READ_FREQUENCY=20000000
+  -DLV_CONF_SKIP
+  -DLV_COLOR_DEPTH=16
+  -DLV_MEM_SIZE=49152
+  -DLV_FONT_MONTSERRAT_14=1
+  -DLV_FONT_MONTSERRAT_16=1
+  -DLV_FONT_MONTSERRAT_18=1
+  -DLV_FONT_MONTSERRAT_20=1
+  -DLV_USE_TFT_ESPI=1
+  -DLV_USE_FLEX=1
+  -DLV_USE_BUTTON=1
+  -DLV_USE_LABEL=1
+  -DLV_USE_TEXTAREA=1
+  -I${PROJECT_DIR}/include
+  -DCONFIG_BT_NIMBLE_ROLE_CENTRAL_DISABLED
+  -DCONFIG_BT_NIMBLE_ROLE_OBSERVER_DISABLED
+
+extra_scripts = pre:copy_lv_conf.py