chore: add publish docs

.github/workflows/publish-docs.yml

@@ -0,0 +1,40 @@
+name: Hex Publish Docs
+
+on:
+  workflow_dispatch:
+    branches:
+      - master
+
+concurrency:
+  group: hex-publish-docs
+  cancel-in-progress: true
+
+jobs:
+  publish:
+    name: Publish
+    runs-on: ubuntu-latest
+    steps:
+    - name: Verify Branch
+      if: github.ref != 'refs/heads/master'
+      run: exit 1
+    - uses: actions/checkout@v4
+    - name: Set up Elixir
+      uses: erlef/setup-beam@v1
+      with:
+        elixir-version: '1.17'
+        otp-version: '27.1'
+    - name: Restore dependencies cache
+      uses: actions/cache@v4
+      with:
+        path: deps
+        key: ${{ runner.os }}-mix-${{ hashFiles('**/mix.lock') }}
+        restore-keys: ${{ runner.os }}-mix-
+    - name: Install dependencies
+      run: |
+        mix local.rebar --force
+        mix local.hex --force
+        mix deps.get
+    - name: Run Hex Publish Docs
+      run: mix hex.publish docs --yes
+      env:
+        HEX_API_KEY: ${{ secrets.HEX_API_KEY }}