feat: add options.type (#2112)

## PR Checklist

- [x] Addresses an existing open issue: fixes #2111
- [x] That issue was marked as [`status: accepting
prs`](https://github.com/JoshuaKGoldberg/create-typescript-app/issues?q=is%3Aopen+is%3Aissue+label%3A%22status%3A+accepting+prs%22)
- [x] Steps in
[CONTRIBUTING.md](https://github.com/JoshuaKGoldberg/create-typescript-app/blob/main/.github/CONTRIBUTING.md)
were taken

## Overview

Goes a different, more comprehensive direction than #2110. Instead of
encouraging a `blockPackageJson` it promotes `type` to a top-level
option. `--type commonjs` will now work if a user really wants.

`blockESLint` will now print its config as `eslint.config.mjs` if
`options.type` is `"commonjs"`. It's still `eslint.config.js` otherwise.

🎁

Author: JoshuaKGoldberg

docs/CLI.md

@@ -56,6 +56,7 @@ Each defaults to a value based on the running system, including an repository if
 | `--pnpm`       | `string`   | pnpm version for `package.json`'s `packageManager` field                                                            | Existing value in `package.json` if it exists                                                  |
 | `--repository` | `string`   | Name for the new repository                                                                                         | The same as `--directory`                                                                      |
 | `--title`      | `string`   | 'Title Case' title for the repository                                                                               | Title-cased `repository`                                                                       |
+| `--type`       | `string`   | package.json modules type                                                                                           | Existing value in `package.json` if it exists, or `"module"`                                   |
 | `--version`    | `string`   | package version to publish as and store in `package.json`                                                           | Existing value in `package.json` if it exists, or `"0.0.0"`                                    |
 | `--words`      | `string[]` | additional words to add to the CSpell dictionary                                                                    | Existing `words` in a `cspell.json` file if it exists, and any new words in from other options |
 

eslint.config.js

@@ -42,7 +42,7 @@ export default tseslint.config(
 			tseslint.configs.strictTypeChecked,
 			tseslint.configs.stylisticTypeChecked,
 		],
-		files: ["**/*.js", "**/*.ts"],
+		files: ["**/*.{js,ts}"],
 		languageOptions: {
 			parserOptions: {
 				projectService: {

src/base.test.ts

@@ -57,6 +57,7 @@ describe("base", () => {
 			pnpm: expect.any(String),
 			repository: "create-typescript-app",
 			title: "Create TypeScript App",
+			type: expect.any(String),
 			version: expect.any(String),
 			// eslint-disable-next-line @typescript-eslint/no-unsafe-member-access, @typescript-eslint/no-require-imports
 			words: require("../cspell.json").words,

src/base.ts

@@ -155,6 +155,10 @@ export const base = createBase({
 			.optional()
 			.describe("GitHub branch ruleset ID for main branch protections"),
 		title: z.string().describe("'Title Case' title for the repository"),
+		type: z
+			.union([z.literal("commonjs"), z.literal("module")])
+			.optional()
+			.describe("package.json modules type"),
 		version: z
 			.string()
 			.optional()
@@ -294,6 +298,8 @@ export const base = createBase({
 			async () => await readTitle(getReadme, getRepository),
 		);
 
+		const getType = lazyValue(async () => (await getPackageData()).type);
+
 		const getVersion = lazyValue(async () => (await getPackageData()).version);
 
 		const getWords = lazyValue(async () => await readWords(take));
@@ -324,6 +330,7 @@ export const base = createBase({
 			repository: getRepository,
 			rulesetId: getRulesetId,
 			title: getTitle,
+			type: getType,
 			version: getVersion,
 			words: getWords,
 			workflowsVersions: getWorkflowData,