created plugin interface

server/src/plugin/mod.rs

@@ -1,2 +1,3 @@
 pub mod plugin;
-pub mod plugin_details;
+pub mod plugin_details;
+pub mod plugin_interface;

server/src/plugin/plugin_interface.rs

@@ -0,0 +1,7 @@
+use std::sync::Arc;
+use crate::client::Client;
+use crate::client_manager::ClientMgrMessage;
+
+pub struct PluginInterface {
+	new_connection_callback: Box<dyn FnMut(&mut PluginInterface) -> ()>,
+}