wip: change to optional field

- note: adjust api to be working with premium deps.

Signed-off-by: Pakin <pakin.t@forth.co.th>

src/models/recipe.rs

@@ -1009,7 +1009,8 @@ pub struct Recipe01 {
     #[serde(default = "BlankString")]
     pub Description: Option<String>,
     pub ExtendID: Value,
-    pub OnTOP: Value,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub OnTOP: Option<Value>,
     #[serde(default = "BlankValueString")]
     pub LastChange: Option<Value>,
     pub MenuStatus: Value,