Support English

[omaryasser]

A lot of users will benefit from supporting English ❤️

We started coding the application with supporting multiple languages in mind. That's why we introduced app_localizations.dart, in which we used to save all strings.

Then after realizing that we will not work on supporting English soon, we decided to inline Arabic text directly in code without adding it into app_localizations.dart.

If you will work on this, you will at least need to:

• Decide on the way with which users will switch the language
• Decide on the mechanism with which you will do that in code (i.e. that can already be done using the app_localizations.dart file).
• Remove all inlined Arabic text and add a variable instead.