feat: configure Renovate to skip patch updates (#1601)

## PR Checklist

- [x] Addresses an existing open issue: fixes #1541
- [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

Removes `"internalChecksFilter": "strict"` because that's the default
value.

Adds some unit tests because `createDotGitHubFiles` wasn't unit tested
before, too.

💖

Author: JoshuaKGoldberg

.github/renovate.json

@@ -3,8 +3,8 @@
 	"automerge": true,
 	"extends": ["config:best-practices", "replacements:all"],
 	"ignoreDeps": ["codecov/codecov-action"],
-	"internalChecksFilter": "strict",
 	"labels": ["dependencies"],
 	"minimumReleaseAge": "3 days",
+	"patch": { "enabled": false },
 	"postUpdateOptions": ["pnpmDedupe"]
 }

cspell.json

@@ -13,6 +13,7 @@
 		"allcontributors",
 		"apexskier",
 		"arethetypeswrong",
+		"automerge",
 		"codespace",
 		"contributorsrc",
 		"execa",