add nodes to a graph in a list

[hussainwali74]

currently this is how we can add nodes to a graph,

builder = StateGraph(TypedDictStateLiteral)

builder.add_node('node_1',node_1)
builder.add_node('node_2',node_2)
builder.add_node('node_3',node_3)

I think this can be improved by passing nodes in a list

nodes = [node_1, node_2, node_3]
.
.
.
(dynamically append more nodes at run time)
builder.add_nodes(nodes)

I have forked a copy of langgraph and added this locally it works.