refactor: move broadcast.Message to shared.Message

- create a new shared state file to manage message state
- replace broadcast.Message with shared.Message in pomodoro logic
- update websocket client handling to use shared.Clients
- remove unnecessary broadcast imports from various files
- ensure consistent message handling across the application

🤖

internal/shared/state.go

@@ -0,0 +1,14 @@
+package shared
+
+import (
+	"git.smsvc.net/pomodoro/GoTomato/pkg/models"
+)
+
+var Message = models.ServerMessage{
+	Mode:         "none",
+	Session:      0,
+	TotalSession: 0,
+	TimeLeft:     0,
+	Ongoing:      false,
+	Paused:       false,
+}