feat: Added agent variables support for graph agents and improved script executor to use the same environment variables as normal agent tool calling for further flexibility

src/graph/types.rs

@@ -1,3 +1,4 @@
+use crate::config::AgentVariable;
 use anyhow::Result;
 use indexmap::IndexMap;
 use serde::{Deserialize, Serialize};
@@ -33,6 +34,9 @@ pub struct Graph {
     #[serde(default)]
     pub conversation_starters: Vec<String>,
 
+    #[serde(default)]
+    pub variables: Vec<AgentVariable>,
+
     #[serde(default)]
     pub settings: GraphSettings,