fix: build in initialize script (#1807)

## PR Checklist

- [x] Addresses an existing open issue: fixes #1362
- [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

The fact that this wasn't reported by anybody else or fixed yet is an
amusing indicator of how rarely _Use this template_ button is used.

💖

package.json

@@ -24,7 +24,7 @@
 	"scripts": {
 		"build": "tsup",
 		"format": "prettier .",
-		"initialize": "tsx ./bin/index.js --mode initialize",
+		"initialize": "pnpm build --no-dts && tsx ./bin/index.js --mode initialize",
 		"lint": "eslint . --max-warnings 0",
 		"lint:knip": "knip",
 		"lint:md": "markdownlint \"**/*.md\" \".github/**/*.md\" --rules sentences-per-line",

src/steps/writing/creation/index.test.ts

@@ -251,7 +251,8 @@ describe("createStructure", () => {
 						"tsx",
 					),
 					scripts: {
-						initialize: "tsx ./bin/index.js --mode initialize",
+						initialize:
+							"pnpm build --no-dts && tsx ./bin/index.js --mode initialize",
 						"test:create": "npx tsx script/create-test-e2e.ts",
 						"test:initialize": "npx tsx script/initialize-test-e2e.ts",
 						"test:migrate": "vitest run -r script/",