* Improve init_logger function and format code with cargo fmt
- Enhance `init_logger` function for better logging configuration.
- Apply `cargo fmt` to format the codebase.
* Refactor main.rs for clarity and modularity in rustfs-gui
- Move `init_logger` function to `utils/logger.rs` for better separation of concerns.
- Create a dedicated `router` module in `router/router.rs`.
- Update `main.rs` to use the new `logger` and `router` modules.
- Apply `cargo fmt` to format the codebase.