Fix and Improve `fa_IR` Locales

[mikoloism]

Summary of Changes:

• Updated the title from the English equivalent (Persian) to the native term (پارسی) for clarity.
• Replaced the term مکان نما with the more accurate term نشانگر.

These changes aim to enhance the clarity and accuracy of the Persian localization, ensuring that it aligns better with common usage and understanding among Persian speakers.