Add Firebase OAuth as an authentication option for CLI tool

[omer-ayhan]

Feature Request

Currently, authentication within the CLI tool is handled exclusively through service files. While this approach works, it's not always the most convenient method for all users. I would like to propose adding Firebase OAuth as an alternative authentication method.

Proposed Solution:

• Implement Firebase OAuth as an extra authentication option within the CLI tool.
• When users run the login command, they should be able to select between using a service file or authenticating via OAuth.
• This will improve flexibility and ease of use, especially for users who may not have service files readily available.

Benefits:

• Makes authentication more accessible to a broader audience.
• Aligns with standard Firebase authentication practices.
• Gives users the option to choose the most convenient authentication method for their workflow.

This feature would be a valuable enhancement for the CLI tool and provide a better user experience.