Add byContains and byJsonPath

- Add document index functions

tests/unit/Mapper/CountMapperTest.php

@@ -3,11 +3,13 @@
 namespace Test\Unit\Mapper;
 
 use BitBadger\PDODocument\Mapper\CountMapper;
+use PHPUnit\Framework\Attributes\TestDox;
 use PHPUnit\Framework\TestCase;
 
 /**
  * Unit tests for the CountMapper class
  */
+#[TestDox('Count Mapper (Unit tests)')]
 class CountMapperTest extends TestCase
 {
     public function testMapSucceeds(): void