Stub out r3bl base

[nazmulidris]

Figure out how to create a server infra to allow tracking multiple user sessions

• requires login on the client side (r3bl cmdr using signin w/ goog or github)?

More info:

1. https://docs.rs/yup-oauth2/latest/yup_oauth2/index.html#service-account-flow
2. Byron/google-apis-rs#182
3. https://stackoverflow.com/questions/67259780/validating-google-sign-in-id-token-in-rust
4. https://medium.com/@maylukas/firebase-token-authentication-in-rust-a1885f0982df