chore(docs): use shared doctum workflow (#574)

.github/workflows/docs.yml

@@ -6,32 +6,20 @@ on:
         tags:
             - "*"
     workflow_dispatch:
+        inputs:
+            tag:
+                description: 'Tag to release'
+    pull_request:
+
+permissions:
+  contents: write
 
 jobs:
     docs:
-        name: "Generate Project Documentation"
-        runs-on: ubuntu-latest
-        steps:
-        - name: Checkout
-          uses: actions/checkout@v4
-        - run: git fetch --depth=1 origin +refs/tags/*:refs/tags/*
-        - name: Setup PHP
-          uses: shivammathur/setup-php@v2
-          with:
-            php-version: 8.1
-        - name: Install Dependencies
-          uses: nick-invision/retry@v3
-          with:
-            timeout_minutes: 10
-            max_attempts: 3
-            command: composer config repositories.sami vcs https://${{ secrets.GITHUB_TOKEN }}@github.com/jdpedrie/sami.git && composer require sami/sami:v4.2 && git reset --hard HEAD
-        - name: Generate Documentation
-          env:
-            GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
-          run: .github/actions/docs/entrypoint.sh
-        - name: Deploy 🚀
-          uses: JamesIves/github-pages-deploy-action@releases/v3
-          with:
-            ACCESS_TOKEN: ${{ secrets.ACCESS_TOKEN }}
-            BRANCH: gh-pages
-            FOLDER: .docs
+        name: "Generate and Deploy Documentation"
+        uses: GoogleCloudPlatform/php-tools/.github/workflows/doctum.yml@main
+        with:
+          title: "Google Auth Library PHP Reference Documentation"
+          default_version: ${{ inputs.tag || github.head_ref || github.ref_name }}
+          dry_run: ${{ github.event_name == 'pull_request' }}
+