first draft of lint/format check github action

.github/workflows/format-lint-check.yml

@@ -0,0 +1,29 @@
+name: Format / Lint Check
+
+on:
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  lint:
+    name: Lint and Format Check
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "22"
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run ESLint
+        run: npm run lint
+
+      - name: Check Prettier formatting
+        run: npm run format:check

package.json

@@ -4,7 +4,8 @@
   "description": "This is a fan made but now officially supported rules implementation (system) for [Foundry Virtual Tabletop](https://foundryvtt.com/) system for Delta Green: The RPG, based on the _Agent's Handbook_ rule set from Arc Dream Publishing (_**not** the Call of Cthulu rules_).",
   "main": "deltagreen.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "lint": "npx eslint .",
+    "format:check": "prettier --check ."
   },
   "repository": {
     "type": "git",