Add support for CJK input method editors

[nonetrix]

Languages like Japanese because they have so many characters have to use a IME (input method editor), pretty much if you type something like watashi it will allow you to turn that into 私. Usually this is managed by either ibus (mostly gnome) fcitx5 (everything else really) along with a engine like Mozc or Anthy which provides the suggestions to pick from. Here is what one looks like

Currently the only option is to change to Japanese keyboard which on surface seems fine, but this doesn't use Mozc. To my knowledge the only difference is that it adds key for yen symbol etc.

What is needed is like GNOME has

It says Mozc instead of just Japanese

Notice it let's you switch modes for input

[mmstick]

IME support is not implemented upstream in iced yet.