feat: add hex publish docs github action

templates/.github/workflows/publish-docs.yaml

@@ -0,0 +1,37 @@
+# This file is synced with beam-community/common-config. Any changes will be overwritten.
+
+name: Publish Docs
+
+on:
+  workflow_dispatch:
+    branches:
+      - master
+
+concurrency:
+  group: hex-publish-docs
+  cancel-in-progress: true
+
+jobs:
+{{#if IS_MIX_PACKAGE}}
+  Hex:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Verify Branch
+        if: github.ref != 'refs/heads/main'
+        run: exit 1
+
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Elixir
+        uses: stordco/actions-elixir/setup@v1
+        with:
+          github-token: $\{{ secrets.GH_PERSONAL_ACCESS_TOKEN }}
+
+      - name: Publish Docs
+        run: mix hex.publish docs --yes
+        env:
+          HEX_API_KEY: $\{{ secrets.HEX_API_KEY }}
+
+{{/if}}