[ImgBot] Optimize images

*Total -- 34.36kb -> 23.71kb (31%)

/assets/icons/meal-check.svg -- 2.61kb -> 1.52kb (41.69%)
/assets/icons/meal-add.svg -- 2.86kb -> 1.72kb (39.81%)
/assets/icons/meal-edit.svg -- 3.01kb -> 1.91kb (36.44%)
/flatpak/app-icon-grid.svg -- 4.56kb -> 2.99kb (34.6%)
/assets/icons/ingredient-check.svg -- 3.61kb -> 2.49kb (30.93%)
/assets/icons/ingredient-add.svg -- 3.85kb -> 2.69kb (30.2%)
/assets/icons/ingredient-edit.svg -- 4.00kb -> 2.88kb (28.05%)
/assets/icons/meal-diary.svg -- 4.43kb -> 3.27kb (26.17%)
/assets/icons/ingredient-diary.svg -- 5.42kb -> 4.24kb (21.86%)

Signed-off-by: ImgBotApp <[email protected]>

Author: ImgBotApp