feat(core): wire up depends_on field for variables

espanso/src/cli/worker/engine/process/middleware/render/mod.rs

@@ -152,6 +152,7 @@ fn convert_var(var: espanso_config::matches::Variable) -> espanso_render::Variab
     var_type: var.var_type,
     params: convert_params(var.params),
     inject_vars: var.inject_vars,
+    depends_on: var.depends_on,
   }
 }
 
@@ -227,6 +228,7 @@ impl<'a> Renderer<'a> for RendererAdapter<'a> {
               var_type: "echo".to_string(),
               params,
               inject_vars: false,
+              ..Default::default()
             },
           )
         }