Add byContains and byJsonPath

- Add document index functions

tests/unit/Mapper/DocumentMapperTest.php

@@ -22,6 +22,7 @@ class TestDocument
 /**
  * Unit tests for the DocumentMapper class
  */
+#[TestDox('Document Mapper (Unit tests)')]
 class DocumentMapperTest extends TestCase
 {
     public function testConstructorSucceedsWithDefaultField(): void