Add shared JC3636W518 board library and PlatformIO config

- shared/lib/JC3636W518: display/touch/backlight init with LVGL 9 glue
  (from scr_st77916.h), pin map, perf monitor (FPS/refresh/CPU)
- shared/include/lv_conf.h: LVGL 9.6 config for all projects
- shared/jc3636w518.ini: common platform/board/build settings
- display_gif_embedded uses it (23.2 fps, 86% CPU)

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

10-OBD-Display-2024/display_gif_embedded/platformio.ini

@@ -1,34 +1,12 @@
-; JC3636W518 — ESP32-S3R8, 16 MB QIO flash, 8 MB OPI PSRAM, 360x360 ST77916 QSPI + CST816S
-; Settings mirror the vendor Arduino IDE setup (2-Program Example/Demo_Arduino/docs/Arduino set up.png)
-
-[env:jc3636w518]
-; pioarduino = Arduino core 3.0.5 (ESP32_Display_Panel 0.1.4 needs core 3.x)
-platform = https://github.com/pioarduino/platform-espressif32/releases/download/51.03.05/platform-espressif32.zip
-board = esp32-s3-devkitc-1
-framework = arduino
-
-board_build.arduino.memory_type = qio_opi
-board_build.flash_mode = qio
-board_upload.flash_size = 16MB
-; GIF compiled into firmware -> 3.4 MB, too big for huge_app (3 MB); 6.25 MB app slots
-board_build.partitions = default_16MB.csv
-
-; optimise for speed instead of size (faster GIF decoding)
-build_unflags = -Os
-build_flags =
-    -O2
-    -DBOARD_HAS_PSRAM
-    -DARDUINO_USB_CDC_ON_BOOT=1
-    ; LVGL (also when compiled as a library) picks up include/lv_conf.h of this project
-    -DLV_CONF_INCLUDE_SIMPLE
-    -Iinclude
-
-; vendor-bundled libraries: ESP32_Display_Panel 0.1.4, ESP32_IO_Expander 0.0.2
-; (the vendor folder also has lvgl 8.3.11 - ignored here, this project uses LVGL 9 from lib_deps)
-lib_extra_dirs = ../../2-Program Example/Demo_Arduino/library
-lib_deps = lvgl/lvgl@9.6.0
-
-upload_port = COM21
-monitor_port = COM21
-monitor_speed = 115200
-monitor_filters = esp32_exception_decoder
+; GIF compiled into the firmware — JC3636W518, common settings in shared/jc3636w518.ini
+
+[platformio]
+extra_configs = ../../shared/jc3636w518.ini
+
+[shared]
+dir = ../../shared
+
+[env:jc3636w518]
+extends = jc3636w518
+; GIF compiled into firmware -> 3.5 MB, too big for huge_app (3 MB); 6.25 MB app slots
+board_build.partitions = default_16MB.csv