Add ghpages github action

Author: sake92

.github/workflows/ghpages.yml

@@ -0,0 +1,28 @@
+
+name: Build and Deploy GhPages docs
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: olafurpg/setup-scala@v5
+
+      - name: Checkout
+        uses: actions/[email protected]
+        with:
+          persist-credentials: false
+
+      - name: Build
+        run: sbt readme/run
+
+      - name: Deploy
+        uses: JamesIves/[email protected]
+        with:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          BRANCH: gh-pages
+          FOLDER: readme/target/scalatex