feat(plugin): AutoCAD-compatible PAUSE, ENTER keyword, and command streaming

crates/ocs_plugin_api/src/ipc/server.rs

@@ -79,5 +79,6 @@ pub fn handle_plugin_request(
         ),
         AddLayer(config) => PluginResponse::OptHandle(host.add_layer(config)),
         ModifyLayer(config) => PluginResponse::Bool(host.modify_layer(config)),
+        ExecuteCommand(cmd) => PluginResponse::Bool(host.execute_command(&cmd)),
     }
 }