Update ar.yml

Fixed some pluralization issues:
-removed %{count} in :zero cases and replaced it with the word zero (in Arabic of course)
-removed  all instances of :many since it is included in and is literately the same as :other

Added the following missing translations:
-present
-restrict_dependent_destroy
-other_than
-percentage=>format=>format

& fixed some other non translation issues
misspelled