feat: Add type:cleanup to outcomeLabels (#635)

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## PR Checklist

- [x] Addresses an existing open issue: fixes #539 
- [x] That issue was marked as [`status: accepting
prs`](https://github.com/JoshuaKGoldberg/template-typescript-node-package/issues?q=is%3Aopen+is%3Aissue+label%3A%22status%3A+accepting+prs%22)
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## Overview

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Author: kristo-baricevic

src/setup/steps/labels/outcomeLabels.ts

@@ -76,4 +76,9 @@ export const outcomeLabels = [
 		description: "Further information is requested",
 		name: "type: question",
 	},
+	{
+		color: "fde282",
+		description: "Tech debt or other code/repository cleanups",
+		name: "type: cleanup",
+	},
 ];