ci: disallow changes to these directories

Author: Jiralite

.github/workflows/supported-versions-only.yml

@@ -0,0 +1,26 @@
+name: Validate only supported API version changes
+on:
+  pull_request:
+    branches: '**'
+    paths:
+      - rest/v6/**/*
+      - rest/v8/**/*
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Project
+        uses: actions/checkout@v4
+
+      - name: Use Node.js v18
+        uses: actions/setup-node@v3
+        with:
+          node-version: 18
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Request changes
+        run: node ./scripts/actions/unsupported-api-version-changes.mjs
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

scripts/actions/unsupported-api-version-changes.mjs

@@ -0,0 +1,18 @@
+import { readFile } from 'node:fs/promises';
+import process from "node:process";
+import { Octokit } from '@octokit/action';
+
+const octokit = new Octokit();
+const [OWNER, REPOSITORY] = process.env.GITHUB_REPOSITORY.split('/');
+
+/** @type {import('@octokit/webhooks-types').PullRequestOpenedEvent | import('@octokit/webhooks-types').PullRequestSynchronizeEvent} */
+const prEvent = JSON.parse(await readFile(process.env.GITHUB_EVENT_PATH, 'utf8'));
+const { pull_request: { number } } = prEvent;
+
+await octokit.pulls.createReview({
+	event: "REQUEST_CHANGES",
+	body: "Please only update supported API versions.",
+	owner: OWNER,
+	repo: REPOSITORY,
+	pull_number: number,
+});