Added Arabic translation

Hello,
After a few hours of work I've completed the brackets Arabic translation. Some words may be in English; Because, I've found it hard to translate to Arabic since I'm still learning it (I'm a pretty Advanced Student), So hopefully a native speaker could review my work and make changes but I think as of now most Arabic speakers would be able to understand and use brackets correctly.
NOTE: The Arabic I used in this translation is called, Fushah Arabic; This is the proper and official type of Arabic that is spoken in Saudi Arabia.
Thanks,
@_C1D