[ImgBot] Optimize images

*Total -- 414.74kb -> 351.30kb (15.3%)

/public/icons/icon-512x512.png -- 16.17kb -> 6.22kb (61.54%)
/public/icons/icon-384x384.png -- 11.05kb -> 4.73kb (57.19%)
/public/og.png -- 18.29kb -> 8.62kb (52.88%)
/public/icons/icon-152x152.png -- 5.51kb -> 2.60kb (52.84%)
/public/icons/icon-144x144.png -- 5.14kb -> 2.44kb (52.6%)
/public/icons/icon-192x192.png -- 8.00kb -> 3.89kb (51.41%)
/public/icons/icon-128x128.png -- 2.31kb -> 1.13kb (50.91%)
/public/icons/icon-96x96.png -- 2.37kb -> 1.33kb (43.72%)
/public/icons/icon-72x72.png -- 1.54kb -> 0.97kb (36.7%)
/public/icons/icon-48x48.png -- 1.01kb -> 0.75kb (25.7%)
/docs/switches.png -- 54.70kb -> 47.26kb (13.61%)
/public/icons/favicon-32x32.png -- 1.12kb -> 1.04kb (6.72%)
/docs/heatmap.png -- 74.72kb -> 70.14kb (6.12%)
/docs/perf.png -- 210.67kb -> 198.02kb (6%)
/public/icons/icon.svg -- 2.17kb -> 2.17kb (0.18%)

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

Author: ImgBotApp