chore: enable jsdoc/informative-docs (#397)

## PR Checklist

- [x] Addresses an existing open issue: fixes #371
- [x] That issue was marked as [`status: accepting
prs`](https://github.com/JoshuaKGoldberg/template-typescript-node-package/issues?q=is%3Aopen+is%3Aissue+label%3A%22status%3A+accepting+prs%22)
- [x] Steps in
[CONTRIBUTING.md](https://github.com/JoshuaKGoldberg/template-typescript-node-package/blob/main/.github/CONTRIBUTING.md)
were taken

## Overview

Enables the rule, with an intentional set of failures.

Author: JoshuaKGoldberg

.eslintrc.cjs

@@ -25,6 +25,9 @@ module.exports = {
 			files: ["**/*.ts"],
 			parser: "@typescript-eslint/parser",
 			rules: {
+				// These off-by-default rules work well for this repo and we like them on.
+				"jsdoc/informative-docs": "error",
+
 				// These on-by-default rules don't work well for this repo and we like them off.
 				"jsdoc/require-jsdoc": "off",
 				"jsdoc/require-param": "off",