Optimize images (#1)

*Total -- 1,189.84kb -> 837.37kb (29.62%)

/screenshots/4.png -- 176.60kb -> 99.82kb (43.48%)
/screenshots/3.png -- 182.61kb -> 116.77kb (36.05%)
/screenshots/2.png -- 153.96kb -> 101.16kb (34.29%)
/src/main/resources/assets/integratednbt/textures/gui/nbt_extractor.png -- 2.32kb -> 1.55kb (33.32%)
/src/main/resources/assets/integratednbt/textures/items/nbt_extractor_remote.png -- 2.20kb -> 1.69kb (23.26%)
/screenshots/1.png -- 669.68kb -> 514.31kb (23.2%)
/src/main/resources/assets/integratednbt/textures/block/nbt_extractor_front.png -- 2.47kb -> 2.07kb (16.36%)

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Co-authored-by: ImgBotApp <ImgBotHelp@gmail.com>

Author: 2 people