feat: implement centralized logging helper

- remove direct log usage
- create a new logging helper
- update all log calls to use the new Logger instance
- set timestamp to ISO8601

🤖

internal/helper/logging.go

@@ -0,0 +1,12 @@
+package helper
+
+import (
+	"github.com/charmbracelet/log"
+	"os"
+	"time"
+)
+
+var Logger = log.NewWithOptions(os.Stdout, log.Options{
+	ReportTimestamp: true,
+	TimeFormat:      time.RFC3339,
+})