add create_workflow script and test

test/workflow/merge_workflow.py

@@ -0,0 +1,14 @@
+import pytest
+import json
+from scripts.workflow import build_protocol_graph, draw_protocol_graph, draw_protocol_graph_with_ports
+
+
+@pytest.mark.parametrize("protocol_name", [
+    "example_bio",
+    # "bioyond_materials_liquidhandling_1",
+])
+def test_build_protocol_graph(protocol_name):
+    d = json.load(open(f"{protocol_name}.json"))
+    graph = build_protocol_graph(labware_info=d["reagent"], protocol_steps=d["workflow"], workstation_name="PRCXi")
+    draw_protocol_graph_with_ports(graph, "graph.png")
+    print(graph)