afrim support for Fcitx5 input method framework.

The afrim manual is available at https://fodydev.github.io/afrim-man/
and the datasets can be found at https://github.com/fodydev/afrim-data/

Feel free to contribute to the project either by providing more datasets,
https://github.com/fodydev/afrim-data/
or by contributing to afrim and the fcitx5 support.
https://github.com/fodydev/afrim
https://github.com/fodydev/fcitx5-afrim
