Add missing Arabic translation strings

[mrcage]

The following Arabic language strings are currently missing:

> php artisan translatable:inspect-translations ar

Found 15 untranslated strings in the ar.json file:
Privacy Policy
View your orders
You can place a new order in :time.
Example: :value
:amount points
Order #:id
Ordered on :date
Do you really want to cancel your order?
Yes
No, keep my order
Cancel order
Maximum
It is not possible to order something now because the maximum orders per day have been exceeded. Please visit us again another 
day.
The shop is currently not available.
This content is currently not available.

[mrcage]

@ecsecos could you have a look at this if you have time?