refactor: Enable eslint RegEx rules (#240)

With the introduction of ESLint 9 and the update of `typescript-eslint`,
there are new rules that will be applied to the code. Those rules are
mainly focused on Regex patterns.

With #230 those rules have been
turned off to keep it consistent with the old behavior.
This change aims to enable those rules.

**Note:** The base for this change is
#230 and not the **main** branch.
This way it's clearer what the real changes are.

eslint.config.js

@@ -48,6 +48,11 @@ export default tseslint.config(
 			...tseslint.configs.recommendedTypeChecked,
 			...tseslint.configs.stylisticTypeChecked,
 		],
+		ignores: [
+			// This file is a copy of an openui5 resource which is located at
+			// https://github.com/SAP/openui5/blob/master/lib/jsdoc/transformApiJson.js
+			"src/formatter/lib/resolveLinks.ts",
+		],
 		languageOptions: {
 			ecmaVersion: 2022,
 			sourceType: "module",
@@ -67,9 +72,6 @@ export default tseslint.config(
 					caughtErrorsIgnorePattern: "^_",
 				},
 			],
-			"@typescript-eslint/no-unused-expressions": "off",
-			"@typescript-eslint/prefer-regexp-exec": "off",
-			"@typescript-eslint/prefer-includes": "off",
 		},
 	}, {
 		// To be discussed: Type-aware checks might add quite some additional work when writing tests