Added tests for country Pakistan

tests/.pest/snapshots/Countries/PakistanTest/it_can_calculate_pakistan_holidays.snap

@@ -0,0 +1,26 @@
+[
+    {
+        "name": "Kashmir Solidarity Day",
+        "date": "2024-02-05"
+    },
+    {
+        "name": "Pakistan Day",
+        "date": "2024-03-23"
+    },
+    {
+        "name": "Labour Day",
+        "date": "2024-05-01"
+    },
+    {
+        "name": "Independence Day",
+        "date": "2024-08-14"
+    },
+    {
+        "name": "Iqbal Day",
+        "date": "2024-11-09"
+    },
+    {
+        "name": "Quaid-e-Azam Day",
+        "date": "2024-12-25"
+    }
+]

tests/Countries/PakistanTest.php

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+<?php
+
+namespace Spatie\Holidays\Tests\Countries;
+
+use Carbon\CarbonImmutable;
+use Spatie\Holidays\Holidays;
+
+it('can calculate pakistan holidays', function () {
+    CarbonImmutable::setTestNowAndTimezone('2024-01-01');
+
+    $holidays = Holidays::for(country: 'pk')->get();
+
+    expect($holidays)
+        ->toBeArray()
+        ->not()->toBeEmpty();
+
+    expect(formatDates($holidays))->toMatchSnapshot();
+});