refactor: restructure session initialization to avoid circular references

types/types.go

@@ -0,0 +1,16 @@
+package types
+
+type Status string
+
+const (
+	INITIALIZING Status = "INITIALIZING"
+	RUNNING      Status = "RUNNING"
+	SETUP        Status = "SETUP"
+)
+
+type TunnelType string
+
+const (
+	HTTP TunnelType = "HTTP"
+	TCP  TunnelType = "TCP"
+)