refactor(core): enhance SDK structure and documentation

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

tests/Feature/Sbp/QrCodeTest.php

@@ -1,6 +1,7 @@
 <?php
 
 use Apoloz\AlfaBank\Sbp\SbpConnector;
+use Apoloz\AlfaBank\Core\AlfaConfig;
 use Apoloz\AlfaBank\Sbp\Requests\GetQrCodeRequest;
 use Apoloz\AlfaBank\Sbp\Data\QrCodeRequestData;
 use Saloon\Http\Faking\MockResponse;
@@ -15,11 +16,16 @@ test('can generate static qr code', function () {
         ], 200),
     ]);
 
-    $connector = new SbpConnector('cert.pem', 'key.pem', 'key-alias');
+    $config = new AlfaConfig(
+        baseUrl: 'https://test.com',
+        certificatePath: __DIR__ . '/../../test_key.pem',
+        privateKeyPath: __DIR__ . '/../../test_key.pem'
+    );
+    $connector = new SbpConnector($config, 'key-alias');
     $connector->withMockClient($mockClient);
 
     $payload = new QrCodeRequestData(
-        TermNo: 'test-term',
+        termNo: 'test-term',
         amount: '100'
     );