Add SendContact method with corresponding test.

tests/TgBotLib/Methods/SendContactTest.php

@@ -0,0 +1,40 @@
+<?php
+
+    namespace TgBotLib\Methods;
+
+    use PHPUnit\Framework\TestCase;
+    use TgBotLib\Bot;
+    use TgBotLib\Exceptions\TelegramException;
+    use TgBotLib\Objects\Message;
+
+    class SendContactTest extends TestCase
+    {
+        private static Bot $bot;
+
+        public static function setUpBeforeClass(): void
+        {
+            // Initialize the Bot instance before tests
+            self::$bot = new Bot(BOT_TOKEN);
+            self::$bot->setAutoRetry(true);
+        }
+
+        /**
+         * Tests the sendContact method.
+         *
+         * @return void
+         */
+        public function testSendContact(): void
+        {
+
+            // Execute the method and retrieve the result
+            $result = self::$bot->sendContact(
+                chat_id: TEST_CHAT_ID,
+                phone_number: '18884074747',
+                first_name: 'FBI',
+            );
+
+            // Assert that the result is an instance of Message
+            $this->assertInstanceOf(Message::class, $result);
+        }
+    }
+