add Amazfit GTR/GTS to README

bump version, add changelog

update gradle plugin

bump version, add changelog

remove old information from the readme

Translated using Weblate (Dutch)

Currently translated at 100.0% (709 of 709 strings)

Translation: Freeyourgadget/Gadgetbridge
Translate-URL: https://hosted.weblate.org/projects/freeyourgadget/gadgetbridge/nl/

fix spelling

Translated using Weblate (French)

Currently translated at 99.4% (677 of 681 strings)

Translation: Freeyourgadget/Gadgetbridge
Translate-URL: https://hosted.weblate.org/projects/freeyourgadget/gadgetbridge/fr/

fix wording

bump version, add changelog