[ImgBot] Optimize images

*Total -- 1,412.40kb -> 975.84kb (30.91%)

/example/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_512.png -- 14.45kb -> 9.69kb (32.93%)
/src/ss3.png -- 175.97kb -> 119.47kb (32.11%)
/src/ss4.png -- 243.34kb -> 165.71kb (31.9%)
/src/ss6.png -- 246.59kb -> 168.16kb (31.81%)
/src/ss5.png -- 261.02kb -> 178.52kb (31.61%)
/example/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_1024.png -- 45.89kb -> 31.58kb (31.18%)
/src/ss1.png -- 174.66kb -> 121.79kb (30.27%)
/src/ss2.png -- 229.23kb -> 162.36kb (29.17%)
/example/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_16.png -- 1.40kb -> 1.00kb (28.62%)
/example/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_256.png -- 5.79kb -> 4.27kb (26.23%)
/example/macos/Runner/Assets.xcassets/AppIcon.appiconset/app_icon_128.png -- 3.20kb -> 2.60kb (18.77%)
/example/ios/Runner/Assets.xcassets/AppIcon.appiconset/[email protected] -- 10.85kb -> 10.68kb (1.62%)

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

Author: ImgBotApp