feat: export RuleConfig and RuleConfigPatch in dart_skills_lint.dart (#182)

Co-authored-by: Reid Baker <reidbaker@google.com>

Author: reidbaker-agent

tool/dart_skills_lint/lib/dart_skills_lint.dart

@@ -6,6 +6,7 @@ export 'src/config_parser.dart';
 export 'src/entry_point.dart';
 export 'src/models/analysis_severity.dart';
 export 'src/models/custom_rule_parameters.dart';
+export 'src/models/rule_config.dart';
 export 'src/models/skill_context.dart';
 export 'src/models/skill_rule.dart';
 export 'src/models/validation_error.dart';

tool/dart_skills_lint/test/api_defaults_test.dart

@@ -4,7 +4,6 @@
 
 import 'dart:io';
 import 'package:dart_skills_lint/dart_skills_lint.dart';
-import 'package:dart_skills_lint/src/models/rule_config.dart';
 import 'package:dart_skills_lint/src/rules/description_length_rule.dart';
 import 'package:dart_skills_lint/src/rules/trailing_whitespace_rule.dart';
 import 'package:dart_skills_lint/src/rules/valid_yaml_metadata_rule.dart';

tool/dart_skills_lint/test/rule_config_test.dart

@@ -5,7 +5,6 @@
 import 'dart:io';
 
 import 'package:dart_skills_lint/dart_skills_lint.dart';
-import 'package:dart_skills_lint/src/models/rule_config.dart';
 import 'package:test/test.dart';
 import 'test_utils.dart';