Higher quality JPEG encoding via tricks from jpegli

[Shnatsel]

Google has recently published a new JPEG library that uses a number of tricks to produce higher-quality outputs at the same size (or same quality outputs at 35% smaller size): https://opensource.googleblog.com/2024/04/introducing-jpegli-new-jpeg-coding-library.html

It would be great to integrate the more generally applicable tricks from it into image's JPEG encoder.