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Add support for Fujitsu ARREW4E remote model

Add support for Fujitsu ARREW4E remote model: a task in LegoFlow-SWE (Harbor dataset). The IRremoteESP8266 library currently does not support the Fujitsu ARREW4E remote (used with AC unit ASYG09KETA‑B). Users report that attempting to control an AC unit with this remote using the library results…

The task

The IRremoteESP8266 library currently does not support the Fujitsu `ARREW4E` remote (used with AC unit ASYG09KETA‑B). Users report that attempting to control an AC unit with this remote using the library results in no response, and trying to set half‑degree temperatures or use native Fahrenheit settings fails.…

Part of Lego-X/LegoFlow-SWE.