Improve client logging.

client/internal/application/logger.go

@@ -0,0 +1,20 @@
+package application
+
+import (
+	"log/slog"
+	"os"
+)
+
+func (a *Application) initializeLogger() {
+	a.baseLogger = slog.New(slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{
+		AddSource: true,
+		Level:     slog.LevelDebug,
+	}))
+
+	a.appLogger = a.baseLogger.With("module", "application")
+}
+
+// NewLogger creates new sub-instance of base logger and adds some additional data to it for persistent output.
+func (a *Application) NewLogger(withs ...interface{}) *slog.Logger {
+	return a.baseLogger.With(withs...)
+}