ESP32s3: Migrate variants to new structure (#7343)

variants/esp32s3/esp32-s3-pico/platformio.ini

@@ -0,0 +1,26 @@
+[env:ESP32-S3-Pico]
+
+board_level = extra
+extends = esp32s3_base
+upload_protocol = esptool
+board = esp32-s3-pico
+board_build.partitions = default_16MB.csv
+
+board_upload.use_1200bps_touch = yes
+board_upload.wait_for_upload_port = yes
+board_upload.require_upload_port = yes
+
+;upload_port = /dev/ttyACM0
+
+build_flags = ${esp32s3_base.build_flags}
+  -DESP32_S3_PICO
+  ;-DPRIVATE_HW
+  -Ivariants/esp32s3/esp32-s3-pico
+  -DBOARD_HAS_PSRAM
+  -DEINK_DISPLAY_MODEL=GxEPD2_290_T94_V2
+  -DEINK_WIDTH=296
+  -DEINK_HEIGHT=128
+
+lib_deps = ${esp32s3_base.lib_deps}
+  zinggjm/GxEPD2@^1.6.2
+  adafruit/Adafruit NeoPixel @ ^1.12.0