[ImgBot] Optimize images

*Total -- 1,549.26kb -> 1,235.29kb (20.27%)

/client/public/assets/banner.png -- 1,547.51kb -> 1,233.54kb (20.29%)
/client/public/assets/icons/person.svg -- 1.75kb -> 1.74kb (0.22%)

Signed-off-by: ImgBotApp <ImgBotHelp@gmail.com>

Author: ImgBotApp