Small plugin structure fix

src/plugin/types.rs

@@ -1,5 +1,19 @@
 use serde::{Deserialize, Serialize};
 
+#[derive(Debug, Serialize, Deserialize)]
+pub struct PluginJson {
+    pub id: String,
+    pub version: String,
+    pub supported_versions: Vec<String>,
+    pub file: String,
+    pub args: Vec<String>,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct PluginHandshake {
+    pub id: String,
+}
+
 #[derive(Debug, Clone, Serialize, Deserialize)]
 #[serde(tag = "type", content = "params", rename_all = "snake_case")]
 pub enum LoaderMessage {}