feat: call start_watcher when connecting to an already running instance

(used to be only when starting the server)

src/mc_server.rs

@@ -123,6 +123,10 @@ pub trait MinecraftServerHandle: Clone {
 
 pub trait MinecraftAPI<T> {
     async fn query_server(&self, addr: &str, port: &str) -> Result<T, OpaqueError>;
+
+    // TODO: move the implementation to here, but
+    /// This should be callable even if there is already a watcher,
+    /// and it should handle the collision itself while returning OK().
     async fn start_watch(
         self,
         server: impl MinecraftServerHandle,