refactor: add explicit return type to createTestingLibraryRule for better type safety

Author: y-hsgw

lib/create-testing-library-rule/index.ts

@@ -1,6 +1,10 @@
 import { ESLintUtils } from '@typescript-eslint/utils';
 
-import { getDocsUrl, TestingLibraryPluginDocs } from '../utils';
+import {
+	getDocsUrl,
+	TestingLibraryPluginDocs,
+	TestingLibraryPluginRuleModule,
+} from '../utils';
 
 import {
 	DetectionOptions,
@@ -27,11 +31,20 @@ export const createTestingLibraryRule = <
 		create: EnhancedRuleCreate<TMessageIds, TOptions>;
 		detectionOptions?: Partial<DetectionOptions>;
 	}
->) =>
-	ESLintUtils.RuleCreator<TestingLibraryPluginDocs<TOptions>>(getDocsUrl)({
+>): TestingLibraryPluginRuleModule<TMessageIds, TOptions> => {
+	const rule = ESLintUtils.RuleCreator<TestingLibraryPluginDocs<TOptions>>(
+		getDocsUrl
+	)({
 		...remainingConfig,
 		create: detectTestingLibraryUtils<TMessageIds, TOptions>(
 			create,
 			detectionOptions
 		),
 	});
+	const { docs } = rule.meta;
+	if (docs === undefined) {
+		throw new Error('Rule metadata must contain `docs` property');
+	}
+
+	return { ...rule, meta: { ...rule.meta, docs } };
+};