implement system init.

server/internal/types/event/events.go

@@ -1,6 +1,7 @@
 package event
 
 const (
+	SYSTEM_INIT       = "system/init"
 	SYSTEM_DISCONNECT = "system/disconnect"
 	SYSTEM_ERROR      = "system/error"
 )

server/internal/types/message/messages.go

@@ -10,6 +10,12 @@ type Message struct {
 	Event string `json:"event"`
 }
 
+type SystemInit struct {
+	Event           string            `json:"event"`
+	ImplicitHosting bool              `json:"implicit_hosting"`
+	Locks           map[string]string `json:"locks"`
+}
+
 type SystemMessage struct {
 	Event   string `json:"event"`
 	Title   string `json:"title"`