add c2 to examples

Author: Jason2866

examples/espidf-arduino-littlefs/platformio.ini

@@ -11,14 +11,17 @@
 [env]
 platform = espressif32
 framework = arduino, espidf
+board_build.filesystem = littlefs
+board_build.partitions = partitions_custom.csv
 monitor_speed = 115200
+
+[env:esp32dev]
+board = esp32dev
 board_build.embed_txtfiles =
     managed_components/espressif__esp_insights/server_certs/https_server.crt
     managed_components/espressif__esp_rainmaker/server_certs/rmaker_mqtt_server.crt
     managed_components/espressif__esp_rainmaker/server_certs/rmaker_claim_service_server.crt
     managed_components/espressif__esp_rainmaker/server_certs/rmaker_ota_server.crt
 
-[env:esp32dev]
-board = esp32dev
-board_build.filesystem = littlefs
-board_build.partitions = partitions_custom.csv
+[env:esp32-c2-devkitm-1]
+board = esp32-c2-devkitm-1