chore(deno): make defaults explicit for fmt

Also add lint workflow for GitHub Actions.

.github/workflows/lint.yml

@@ -0,0 +1,21 @@
+name: Lint
+on:
+  pull_request:
+    branches: [main]
+  push:
+  release:
+
+jobs:
+  ts:
+    name: TypeScript
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      id-token: write
+    steps:
+      - uses: actions/checkout@v4
+      - uses: denoland/setup-deno@v2
+        with:
+          deno-version: v2.x
+      - name: Run linter
+        run: deno chedck golinkctl.ts

deno.json

@@ -8,5 +8,10 @@
   },
   "tasks": {
     "cli": "deno run -A ./golinkctl.ts"
+  },
+  "fmt": {
+    "indentWidth": 2,
+    "singleQuote": false,
+    "useTabs": false
   }
 }