Refactor main.rs for clarity and modularity in rustfs-gui (#225)

* 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.

cli/rustfs-gui/src/utils/logger.rs

@@ -0,0 +1,48 @@
+use dioxus::logger::tracing::debug;
+use tracing_appender::non_blocking::WorkerGuard;
+use tracing_appender::rolling::{RollingFileAppender, Rotation};
+use tracing_subscriber::fmt;
+use tracing_subscriber::layer::SubscriberExt;
+use tracing_subscriber::util::SubscriberInitExt;
+
+/// Initialize the logger with a rolling file appender
+/// that rotates log files daily
+pub fn init_logger() -> WorkerGuard {
+    // configuring rolling logs rolling by day
+    let home_dir = dirs::home_dir().expect("无法获取用户目录");
+    let rustfs_dir = home_dir.join("rustfs");
+    let logs_dir = rustfs_dir.join("logs");
+    let file_appender = RollingFileAppender::builder()
+        .rotation(Rotation::DAILY) // rotate log files once every hour
+        .filename_prefix("rustfs-cli") // log file names will be prefixed with `myapp.`
+        .filename_suffix("log") // log file names will be suffixed with `.log`
+        .build(logs_dir) // try to build an appender that stores log files in `/ var/ log`
+        .expect("initializing rolling file appender failed");
+    // non-blocking writer for improved performance
+    let (non_blocking_file, worker_guard) = tracing_appender::non_blocking(file_appender);
+
+    // console output layer
+    let console_layer = fmt::layer()
+        .with_writer(std::io::stdout)
+        .with_ansi(true)
+        .with_line_number(true); // enable colors in the console
+
+    // file output layer
+    let file_layer = fmt::layer()
+        .with_writer(non_blocking_file)
+        .with_ansi(false)
+        .with_thread_names(true)
+        .with_target(true)
+        .with_thread_ids(true)
+        .with_level(true)
+        .with_line_number(true); // disable colors in the file
+
+    // Combine all tiers and initialize global subscribers
+    tracing_subscriber::registry()
+        .with(console_layer)
+        .with(file_layer)
+        .with(tracing_subscriber::EnvFilter::new("info")) // filter the log level by environment variables
+        .init();
+    debug!("Logger initialized");
+    worker_guard
+}