[ImgBot] Optimize images

*Total -- 1,537.64kb -> 759.95kb (50.58%)

/pics/v3.png -- 167.60kb -> 71.01kb (57.63%)
/pics/v2.png -- 1,153.36kb -> 550.21kb (52.29%)
/pics/v3-Mobile.png -- 74.60kb -> 43.91kb (41.14%)
/pics/v1.png -- 87.98kb -> 53.96kb (38.67%)
/src/frontend/static/embed.png -- 51.91kb -> 38.86kb (25.13%)
/src/frontend/static/favicon.svg -- 2.19kb -> 1.99kb (8.76%)

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

src/frontend/static/favicon.svg

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