feat: add NeoPixel example

platformio.ini

@@ -61,3 +61,34 @@ build_src_filter =
     +<examples/relay/*.cpp>
     +<src/*.c>
     +<src/*.cpp>
+
+[env:esp01_1m_neopixel]
+platform = platformio/espressif8266@^4.2.1
+board = esp01_1m
+framework = arduino
+upload_speed = 115200
+monitor_speed = 115200
+board_build.partitions = partitions_ota_1M.csv
+board_build.flash_mode = dout
+board_build.flash_size = 1M
+lib_deps = ${common.lib_deps}
+    adafruit/Adafruit NeoPixel@^1.15.1
+build_src_filter = 
+    +<examples/neopixel/*.cpp>
+    +<src/*.c>
+    +<src/*.cpp>
+
+[env:d1_mini_neopixel]
+platform = platformio/espressif8266@^4.2.1
+board = d1_mini
+framework = arduino
+upload_speed = 115200
+monitor_speed = 115200
+board_build.flash_mode = dio
+board_build.flash_size = 4M
+lib_deps = ${common.lib_deps}
+    adafruit/Adafruit NeoPixel@^1.15.1
+build_src_filter = 
+    +<examples/neopixel/*.cpp>
+    +<src/*.c>
+    +<src/*.cpp>