fix: infer --guide-title (#1138)

## PR Checklist

- [x] Addresses an existing open issue: fixes #1137
- [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

Fills in a missing `values['guide-title']`. Sigh.

Author: JoshuaKGoldberg

src/shared/options/readOptions.test.ts

@@ -35,6 +35,7 @@ const emptyOptions = {
 	excludeTests: undefined,
 	funding: undefined,
 	guide: undefined,
+	guideTitle: undefined,
 	logo: undefined,
 	offline: undefined,
 	owner: undefined,
@@ -753,6 +754,7 @@ describe("readOptions", () => {
 			      "funding": undefined,
 			      "github": "mock.git",
 			      "guide": undefined,
+			      "guideTitle": undefined,
 			      "logo": undefined,
 			      "mode": "migrate",
 			      "offline": true,

src/shared/options/readOptions.ts

@@ -85,6 +85,7 @@ export async function readOptions(
 		excludeTests: values["unit-tests"],
 		funding: values.funding,
 		guide: values.guide,
+		guideTitle: values["guide-title"],
 		logo: values.logo,
 		offline: values.offline,
 		owner: values.owner,