Added prettier github workflow.

Author: lukester1975

.github/workflows/prettier.yml

@@ -0,0 +1,33 @@
+name: Prettier
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref }}
+  cancel-in-progress: true
+
+jobs:
+  prettier:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Setup node
+        uses: actions/setup-node@v3
+        with:
+          node-version: latest
+
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: |
+          yarn install --immutable --immutable-cache --check-cache
+
+      - name: Check
+        run: |
+          yarn run prettier:check

package.json

@@ -333,6 +333,7 @@
   "scripts": {
     "compile": "tsc -p ./",
     "postinstall": "husky install",
+    "prettier:check": "prettier --check **.md **.ts **.yml **.json",
     "vscode:prepublish": "npm run compile",
     "watch": "tsc -watch -p ./"
   },