[ImgBot] Optimize images

*Total -- 2,538.77kb -> 1,143.17kb (54.97%)

/screenshots/count_down_light.png -- 261.07kb -> 97.89kb (62.51%)
/screenshots/count_down_dark.png -- 265.28kb -> 101.06kb (61.9%)
/screenshots/clock_light.png -- 356.03kb -> 141.18kb (60.35%)
/screenshots/clock_dark.png -- 287.55kb -> 131.11kb (54.4%)
/screenshots/stopwatch_light.png -- 270.51kb -> 123.89kb (54.2%)
/screenshots/stopwatch_dark.png -- 276.94kb -> 127.43kb (53.99%)
/screenshots/bed_light.png -- 403.61kb -> 192.38kb (52.33%)
/screenshots/bed_dark.png -- 377.98kb -> 189.96kb (49.74%)
/assets/icons/Moon.svg -- 1.21kb -> 1.08kb (10.19%)
/assets/icons/stop_watch.svg -- 3.20kb -> 2.96kb (7.57%)
/assets/icons/clock.svg -- 3.23kb -> 2.99kb (7.41%)
/assets/icons/Settings.svg -- 2.90kb -> 2.73kb (5.79%)
/assets/icons/world.svg -- 3.25kb -> 3.09kb (4.93%)
/assets/icons/watch_2.svg -- 3.32kb -> 3.20kb (3.73%)
/assets/icons/Sydney.svg -- 5.49kb -> 5.37kb (2.24%)
/assets/icons/Sun.svg -- 5.93kb -> 5.81kb (2.12%)
/assets/icons/Liberty.svg -- 11.27kb -> 11.04kb (2.12%)

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