Add square step to arithmetic workflow. Add JSON write and read methods to workflow model.

Author: GeigerJ2

example_workflows/arithmetic/aiida.ipynb

@@ -4,3 +4,6 @@ def get_prod_and_div(x, y):
 
 def get_sum(x, y):
     return x + y
+
+def square(x):
+    return x**2

example_workflows/arithmetic/workflow.py

@@ -20,6 +20,8 @@ dependencies = [
   "numpy>=1.21,<2",
   "jobflow>=0.1.18,<=0.1.19",
   "pyiron_base>=0.11.10,<=0.11.11",
+  "pydantic",
+  "rich"
 ]
 
 [project.optional-dependencies]