Add ESP-NOW master/slave discovery on DIP network channel.

Initialize WiFi and ESP-NOW from shared app config; master broadcasts
discover packets and collects slave info, slaves respond on matching
network while UART commands stay master-only.

Co-authored-by: Cursor <cursoragent@cursor.com>

main/CMakeLists.txt

@@ -15,12 +15,23 @@ idf_component_register(
   "uart_proto.c"
   "cmd_handler.c"
   "cmd_version.c"
+  "esp_now_comm.c"
   "proto/uart_messages.pb.c"
   "proto/pb_encode.c"
   "proto/pb_common.c"
   INCLUDE_DIRS
   "."
-  "proto")
+  "proto"
+  REQUIRES
+  esp_wifi
+  esp_netif
+  esp_event
+  nvs_flash
+  PRIV_REQUIRES
+  esp_driver_gpio
+  esp_driver_uart
+  esp_driver_i2c
+  app_update)
 
 target_compile_definitions(${COMPONENT_LIB}
                            PRIVATE "POWERPOD_GIT_HASH=\"${POWERPOD_GIT_HASH}\"")