fix: remove potential panic on initialize result serialization in nvim-core

nvim-core/src/lib.rs

@@ -610,7 +610,7 @@ pub async fn run_mcp_loop(app_name: &str, app_version: &str) {
                     send_response(JsonRpcResponse {
                         jsonrpc: "2.0".to_string(),
                         id,
-                        result: Some(serde_json::to_value(init).unwrap()),
+                        result: Some(serde_json::to_value(init).unwrap_or_default()),
                         error: None,
                     })
                     .await;