break: enhance server message structure and settings

- add explicit server messages for start and end
- include pomodoro setttings in server messages
- update README

🤖

internal/shared/state.go

@@ -8,12 +8,12 @@ var Message = ResetToDefault()
 
 func ResetToDefault() models.ServerMessage {
 	return models.ServerMessage{
-		Mode:         "",
-		Session:      0,
-		TotalSession: 0,
-		TimeLeft:     0,
-		Ongoing:      false,
-		Paused:       false,
+		Mode:             "Idle",
+		PomodoroSettings: DefaultPomodoroConfig,
+		Session:          0,
+		TimeLeft:         DefaultPomodoroConfig.Work,
+		Ongoing:          false,
+		Paused:           false,
 	}
 }