feat: Implement logging system

- Create TrackerLogger for file-based logging
- Auto-create logs directory if not exists
- Generate daily log files with timestamp format
- Support different log levels (INFO, WARNING, ERROR)
- Implement log_stats() for metric logging
- Implement log_alert() for alert logging
- Implement log_error() for error logging
- Maintain compatibility with Python version's logging format

src/logger.rs

@@ -0,0 +1,57 @@
+use chrono::Local;
+use std::fs::{self, OpenOptions};
+use std::io::Write;
+use std::path::PathBuf;
+
+pub struct TrackerLogger {
+    log_dir: PathBuf,
+}
+
+impl TrackerLogger {
+    pub fn new(log_dir: &str) -> Self {
+        let log_dir = PathBuf::from(log_dir);
+        if !log_dir.exists() {
+            fs::create_dir_all(&log_dir).ok();
+        }
+        TrackerLogger { log_dir }
+    }
+
+    fn get_log_file(&self) -> PathBuf {
+        let date = Local::now().format("%Y%m%d").to_string();
+        self.log_dir.join(format!("tracker_{}.log", date))
+    }
+
+    fn write_log(&self, level: &str, message: &str) {
+        let timestamp = Local::now().format("%Y-%m-%d %H:%M:%S").to_string();
+        let log_message = format!("{} - SystemTracker - {} - {}\n", timestamp, level, message);
+
+        if let Ok(mut file) = OpenOptions::new()
+            .create(true)
+            .append(true)
+            .open(self.get_log_file())
+        {
+            let _ = file.write_all(log_message.as_bytes());
+        }
+    }
+
+    pub fn log_stats(&self, stats_type: &str, stats_data: &str) {
+        let message = format!("{}: {}", stats_type, stats_data);
+        self.write_log("INFO", &message);
+    }
+
+    pub fn log_alert(&self, message: &str) {
+        let alert_message = format!("ALERT: {}", message);
+        self.write_log("WARNING", &alert_message);
+    }
+
+    pub fn log_error(&self, error_message: &str) {
+        let error_msg = format!("ERROR: {}", error_message);
+        self.write_log("ERROR", &error_msg);
+    }
+}
+
+impl Default for TrackerLogger {
+    fn default() -> Self {
+        Self::new("logs")
+    }
+}