chore: reorganize test forlder for support VS Code commad Dart: Go to Test/Implementation File (#527)

* chore: reorganize test forlder for support VS Code commad Dart: Go to Test/Implementation File

https://dartcode.org/docs/commands/#dart-go-to-testimplementation-file

* chore: update changelog

* fix: resolve example path

Author: dkrutskikh

CHANGELOG.md

@@ -9,8 +9,8 @@ import 'package:dart_code_metrics/src/analyzers/lint_analyzer/models/severity.da
 import 'package:dart_code_metrics/src/utils/node_utils.dart';
 import 'package:test/test.dart';
 
+import '../../../../../../stubs_builders.dart';
 import '../../../../../helpers/anti_patterns_test_helper.dart';
-import '../../../../../stubs_builders.dart';
 
 const _examplePath = 'long_method/examples/example.dart';
 const _widgetExamplePath = 'long_method/examples/widget.dart';

test/analyzer_plugin/analyzer_plugin_utils_test.dart renamed to test/src/analyzer_plugin/analyzer_plugin_utils_test.dart

@@ -9,8 +9,8 @@ import 'package:dart_code_metrics/src/analyzers/lint_analyzer/models/severity.da
 import 'package:dart_code_metrics/src/utils/node_utils.dart';
 import 'package:test/test.dart';
 
+import '../../../../../../stubs_builders.dart';
 import '../../../../../helpers/anti_patterns_test_helper.dart';
-import '../../../../../stubs_builders.dart';
 
 const _examplePath = 'long_parameter_list/examples/example.dart';