Add byContains and byJsonPath

- Add document index functions

tests/unit/DocumentExceptionTest.php

@@ -4,11 +4,13 @@ namespace Test\Unit;
 
 use BitBadger\PDODocument\DocumentException;
 use Exception;
+use PHPUnit\Framework\Attributes\TestDox;
 use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for the DocumentException class
  */
+#[TestDox('Document Exception (Unit tests)')]
 class DocumentExceptionTest extends TestCase
 {
     public function testConstructorSucceedsWithCodeAndPriorException()