ci: add check-dist workflow, engines field, .nvmrc, mark dist as generated; align checkout to v5

Author: kmendell

.gitattributes

@@ -0,0 +1 @@
+dist/* -diff linguist-generated

.github/workflows/check-dist.yml

@@ -0,0 +1,31 @@
+name: Check dist
+
+on:
+  pull_request:
+    branches: [main]
+
+jobs:
+  check-dist:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build action
+        run: npm run build
+
+      - name: Ensure dist is up to date
+        run: |
+          if ! git diff --quiet -- dist; then
+            echo "dist/ is not up to date. Run 'npm run build' and commit the changes."
+            git --no-pager diff -- dist | head -n 200 || true
+            exit 1
+          fi

.github/workflows/release.yml

@@ -70,7 +70,7 @@ jobs:
     if: startsWith(github.ref, 'refs/tags/v') && !contains(github.ref_name, 'alpha') && !contains(github.ref_name, 'beta') && !contains(github.ref_name, 'rc')
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           fetch-depth: 0
 

.nvmrc

@@ -0,0 +1 @@
+20

package.json

@@ -3,6 +3,9 @@
   "version": "1.1.2",
   "description": "GitHub Action for running svelte-check with problem matcher",
   "main": "dist/index.js",
+  "engines": {
+    "node": ">=20 <21"
+  },
   "scripts": {
     "build": "rm -rf lib dist && tsc --outDir lib && ncc build lib/src/index.js -o dist && cp .github/svelte-check-matcher.json dist/",
     "dev": "tsc --watch",