Add Farsi/fa language support

[hossshakiba]

Fixes #

Description of the Change

Add Farsi(persian) language support.

Checklist

• PR only contains one change (considered splitting up PR)
• unit-test added
• documentation updated
• CHANGELOG.md updated (only for user relevant changes)
• author name in AUTHORS

[codecov]

Codecov Report

Merging #972 (2b4a17e) into master (fa7f935) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #972   +/-   ##
=======================================
  Coverage   96.56%   96.56%           
=======================================
  Files          31       31           
  Lines        1716     1716           
=======================================
  Hits         1657     1657           
  Misses         59       59           

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