feat: Provide automated Google Login setup

[phorward]

Currently, these steps are necessary for setting-up Google Login for a VIUR3 project. This is awful and too much manual intervention. Can it be automated?

1. https://console.cloud.google.com/apis/credentials/consent?project=MYPROJECT-viur3
2. Internal -> Create
3. App name: MYPROJECT-viur3
4. User-support email user@company.de
5. Authorized domain 1: MYPROJECT-viur3.appspot.com
6. Developer contact: user@company.de
7. Save & continue
8. https://console.cloud.google.com/apis/credentials/oauthclient?project=MYPROJECT-viur3
9. "Web Application" - "Web client 1"
10. Authorized JavaScript origins

• https://MYPROJECT-viur3.appspot.com
• http://localhost:8080
• http://localhost:8081
• http://localhost:8082
• http://localhost

11. Authorized redirect URIs

• https://MYPROJECT-viur3.appspot.com
• http://localhost:8080
• http://localhost:8081
• http://localhost:8082
• http://localhost

12. Create