Add English translation

[anthonyfok]

Responding to the open-ended question on README.md:

未確定問題

• 使唔使加多語言

Yes, of course, at least for English! 😁 For example, we are introducing Jyutping to native English speakers here in Canada, and it would be immensively helpful to have such officially recommended input method engines/apps and instructions readily available for early Cantonese learners (who aren't able to read all the Honzi 漢字.

May I help to contribute to a pull request for the English page(s) (eventually)?