Add lint workflow

.github/workflows/lint.yml

@@ -0,0 +1,24 @@
+name: WebExt Lint
+on: [push, pull_request]
+
+permissions:
+  contents: read
+
+jobs:
+  web-ext-lint:
+    name: WebExt Lint
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout https://github.com/${{ github.repository }}@${{ github.ref }}
+        uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: lts/*
+
+      - name: Run linter
+        run: npx --no-install web-ext lint