Add Zola GitHub Pages workflow

Publish site on push to main. Adds static/CNAME with
zokipedia.hahwul.com and uses shalzz/zola-deploy-action@v0.21.0 with
GH_TOKEN secret.

Author: hahwul

.github/workflows/zola.yml

@@ -0,0 +1,22 @@
+name: Zola on GitHub Pages
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  build:
+    name: Publish site
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout main
+        uses: actions/checkout@v4
+
+      - name: Add CNAME file
+        run: echo "zokipedia.hahwul.com" > static/CNAME
+
+      - name: Build and deploy
+        uses: shalzz/zola-deploy-action@v0.21.0
+        env:
+          GITHUB_TOKEN: ${{ secrets.GH_TOKEN }}