feat: add PR Review request workflow (#632)

## PR Checklist

- [x] Addresses an existing open issue: fixes #312
- [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)
- [x] Steps in
[CONTRIBUTING.md](https://github.com/JoshuaKGoldberg/template-typescript-node-package/blob/main/.github/CONTRIBUTING.md)
were taken

## Overview

Adds two actions:

* `pr-review-requested.yml`: removes `status: waiting for author` when a
PR review is requested
* `pr-review-submitted.yml`: adds `status: waiting for author` when a PR
review is submitted

Author: JoshuaKGoldberg

.github/workflows/pr-review-requested.yml

@@ -0,0 +1,21 @@
+jobs:
+  pr_review_requested:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions-ecosystem/action-remove-labels@v1
+        with:
+          labels: "status: waiting for author"
+      - if: failure()
+        run: |
+          echo "Don't worry about if the previous step failed."
+          echo "See https://github.com/actions-ecosystem/action-remove-labels/issues/221."
+
+name: PR Review Requested
+
+on:
+  pull_request_target:
+    types:
+      - review_requested
+
+permissions:
+  pull-requests: write

src/hydrate/steps/writing/creation/dotGitHub/createWorkflowFile.ts

@@ -13,6 +13,9 @@ interface WorkflowFileOn {
 		  }
 		| null
 		| string;
+	pull_request_target?: {
+		types: string[];
+	};
 	push?: {
 		branches: string[];
 	};

src/hydrate/steps/writing/creation/dotGitHub/workflows.ts

@@ -104,6 +104,29 @@ export function createWorkflows({
 				},
 			],
 		}),
+		"pr-review-requested.yml": createWorkflowFile({
+			name: "PR Review Requested",
+			on: {
+				pull_request_target: {
+					types: ["review_requested"],
+				},
+			},
+			permissions: {
+				"pull-requests": "write",
+			},
+			steps: [
+				{
+					uses: "actions-ecosystem/action-remove-labels@v1",
+					with: {
+						labels: "status: waiting for author",
+					},
+				},
+				{
+					if: "failure()",
+					run: 'echo "Don\'t worry about if the previous step failed."\necho "See https://github.com/actions-ecosystem/action-remove-labels/issues/221."\n',
+				},
+			],
+		}),
 		"prettier.yml": createWorkflowFile({
 			name: "Prettier",
 			runs: ["pnpm format --list-different"],