feat: add runArgs to blockTSup (#1859)

## PR Checklist

- [x] Addresses an existing open issue: fixes #1854
- [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

💖

Author: JoshuaKGoldberg

src/next/blocks/blockTSup.ts

@@ -14,6 +14,7 @@ export const blockTSup = base.createBlock({
 	},
 	addons: {
 		entry: z.array(z.string()).default([]),
+		runArgs: z.array(z.string()).default([]),
 	},
 	migrate() {
 		return {
@@ -56,7 +57,12 @@ pnpm build --watch
 					jobs: [
 						{
 							name: "Build",
-							steps: [{ run: "pnpm build" }, { run: "node ./lib/index.js" }],
+							steps: [
+								{ run: "pnpm build" },
+								{
+									run: `node ./lib/index.js${addons.runArgs.map((arg) => ` ${arg}`).join("")}`,
+								},
+							],
 						},
 					],
 				}),