Add workaround for input method users

[kappa-maintainer]

This approach is tricky and need further testing by #chinese-general
This PR also contain a new line breaking algorithm based on icu4j, for which the Mojang version was excluded.

[eigenraven]

Can you run the spotlessApply gradle task to reformat the code?

[kappa-maintainer]

Connection to spotless is a bit unstable here, so I removed it to speedup gradle

[kappa-maintainer]

I got some other idea when I dealing with book signing. I will mark this PR ready to review once it's done

[kappa-maintainer]

The wrapper approach is hard to handle NEI and has obvious input delay, so I switched to the current one.
It works by adding an imeOn flag to Display and refuse non-char event when it is true. An IME char Queue is also added to Keyboard to bypass the limited size of keyEventChars[]. The imeOn is switched whenever common IME switching keybind detected or F12 is pressed, the detail of this part may need further test and improvement.

[eigenraven]

I made a few style changes, and disabled the IME hacks by default (you can turn them on and the keybinds in the config now)