Switch Default Logging Library to slog with Logger Abstraction

Switch the default logging library to slog. Additionally, abstract the logger logic to seamlessly support other logging libraries like zerolog.

Steps

1. Integration: Incorporate slog as the default logging library.
2. Abstraction Layer: Implement a logger abstraction for compatibility with different logging libraries.
3. Adapters: Develop adapters for specific logging libraries (e.g., zerolog) to conform to the common interface.
4. Testing: Ensure the logger abstraction and adapters function correctly with various logging libraries.
5. Documentation: Update project documentation to reflect the changes and guide users on configuring/logging library options.

Start by locating the current logging integration and existing logger tests in the Go CLI. Trace how logging is configured and used, then define the common abstraction and adapter boundaries; done means slog is the default, alternative libraries can conform, tests cover the abstraction and adapters, and documentation explains configuration.