(Chore) Use doppler with github actions

[sirpy]

• [ ] fill the *_mobile branch configs in doppler with android/ios secrets
• [ ] use doppler cli in github actions yml file to download both env_secrets and env_mobile into the .env doppler secrets download --no-file --format env --token=<service token> notice that you need to run doppler secrets twice each time with a different service token, one for _secrets and one for _mobile