[ImgBot] Optimize images

*Total -- 3,040.45kb -> 2,616.91kb (13.93%)

/app/assets/images/qrcode.png -- 5.74kb -> 3.08kb (46.38%)
/docs/images/importmap-install.png -- 27.62kb -> 16.16kb (41.48%)
/docs/images/stimulus-install.png -- 23.87kb -> 14.70kb (38.39%)
/app/assets/images/rails-g-stimulus.png -- 39.82kb -> 25.75kb (35.35%)
/docs/images/rails-g-stimulus.png -- 39.82kb -> 25.75kb (35.35%)
/docs/images/stimulus-install-2.png -- 200.05kb -> 146.43kb (26.8%)
/docs/images/importmap-install-2.png -- 159.80kb -> 119.29kb (25.35%)
/app/assets/images/accordion.png -- 2,543.73kb -> 2,265.75kb (10.93%)

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

Author: ImgBotApp