feat: add keyboard controls

- add keyboard listener for space, r, and q keys
- create shared state for server messages
- update desktop and terminal notifications to use shared state

🤖

internal/shared/state.go

@@ -0,0 +1,7 @@
+package shared
+
+import (
+	"git.smsvc.net/pomodoro/GoTomato/pkg/models"
+)
+
+var ServerMessage models.ServerMessage