Added Pashto translations

## Description
Fixes DenverCoder1#236

### Type of change
- [x] New feature (added a non-breaking change which adds functionality)

## How Has This Been Tested?
- [x] Tested locally with a valid username
- [x] Tested locally with an invalid username
- [x] Ran tests with composer test
- [x] Added or updated test cases to test new features

## Checklist:
- [x] I have checked to make sure no other pull requests are open for this issue
- [x] The code is properly formatted and is consistent with the existing code style
- [x] I have commented my code, particularly in hard-to-understand areas
- [x] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings

src/translations.php

@@ -165,6 +165,14 @@
         "Longest Week Streak" => "Najdłuższa Seria Tygodni",
         "Present" => "Dziś",
     ],
+    "ps" => [
+        "Total Contributions" => "ټولې ونډې",
+        "Current Streak" => "اوسنی پرمختګ",
+        "Longest Streak" => "تر ټولو اوږد پرمختګ",
+        "Week Streak" => "د اونۍ پرمختګ",
+        "Longest Week Streak" => "د اونۍ تر ټولو اوږد پرمختګ",
+        "Present" => "اوس",
+    ],
     "pt_BR" => [
         "Total Contributions" => "Total de Contribuições",
         "Current Streak" => "Sequência Atual",