chore: Add phpunit config file

Author: thefeqy

.gitignore

@@ -1,5 +1,4 @@
 vendor
 .env
 composer.lock
-phpstan.neon
-phpunit.xml
+phpstan.neon

phpunit.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit
+        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/10.3/phpunit.xsd"
+        bootstrap="vendor/autoload.php"
+        colors="true"
+        executionOrder="depends,defects"
+        failOnEmptyTestSuite="true"
+        extensions="Pest\Plugins\PhpUnit\Extension"
+>
+    <testsuite name="Unit">
+        <directory suffix="Test.php">tests/Unit</directory>
+    </testsuite>
+    <testsuite name="Feature">
+        <directory suffix="Test.php">tests/Feature</directory>
+    </testsuite>
+    <source>
+        <include>
+            <directory suffix=".php">./src</directory>
+        </include>
+    </source>
+</phpunit>