ci: add gcp creds

Signed-off-by: Cameron Smith <cameron.ray.smith@gmail.com>

Author: cameronraysmith

.github/workflows/manuscript.yaml

@@ -30,6 +30,10 @@ jobs:
         uses: quarto-dev/quarto-actions/setup@c1b50d36cf3c22b3dc7e530bd1b36634e824e545 # v2
         with:
           tinytex: true
+      - name: "Authenticate to Google Cloud"
+        uses: "google-github-actions/auth@55bd3a7c6e2ae7cf1877fd1ccb9d54c0503c457c" # ratchet:google-github-actions/auth@v2
+        with:
+          credentials_json: "${{ secrets.GOOGLE_APPLICATION_CREDENTIALS_DATA }}"
       - name: Setup tmate debug session
         # if: ${{ inputs.debug_enabled == 'true' }}
         uses: mxschmitt/action-tmate@a283f9441d2d96eb62436dc46d7014f5d357ac22 # v3