support async eval function and add pyodide sandbox example

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "langgraph-codeact"
-version = "0.1.3"
+version = "0.1.2"
 description = "LangGraph implementation of CodeAct agent that generates and executes code instead of tool calling."
 authors = [
     {name = "Nuno Campos",email = "nuno@langchain.dev"}

uv.lock

@@ -500,7 +500,7 @@ wheels = [
 
 [[package]]
 name = "langgraph-codeact"
-version = "0.1.3"
+version = "0.1.2"
 source = { editable = "." }
 dependencies = [
     { name = "langgraph" },