add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

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# Locally calculated after checking pgp signature
sha256    959d22ae07f22803bc66ff40d373a854532a6e4732680bf8a96a3fbcb9f80a2c    leafpad-0.8.18.1.tar.gz