[ImgBot] Optimize images (#246)

*Total -- 5,933.58kb -> 1,375.26kb (76.82%)

/paper/docs.png -- 4,390.51kb -> 157.54kb (96.41%)
/static/example.gif -- 669.78kb -> 484.93kb (27.6%)
/static/logo_dark_github.png -- 112.68kb -> 86.31kb (23.4%)
/static/logo_dark_docs.png -- 111.55kb -> 86.00kb (22.9%)
/static/logo.png -- 109.63kb -> 89.99kb (17.91%)
/static/windows_quality_fix.png -- 34.61kb -> 29.19kb (15.65%)
/static/docs.png -- 209.36kb -> 177.73kb (15.11%)
/static/logo_light_transparent.png -- 116.05kb -> 102.36kb (11.79%)
/static/icon.png -- 2.03kb -> 1.79kb (11.61%)
/static/logo_dark_transparent.png -- 123.63kb -> 109.45kb (11.46%)
/static/wizard_light.png -- 26.28kb -> 24.23kb (7.8%)
/static/wizard_dark.png -- 27.48kb -> 25.72kb (6.43%)

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

Author: imgbot[bot]