feat(mean_field): added initial implementation

note this implementation lacks many tests

generate_mesh.py

@@ -0,0 +1,13 @@
+from stroid.config import MeshConfig
+from stroid.IO import SaveStroidMesh
+from stroid import GenerateMesh
+
+cfg = MeshConfig()
+cfg.order = 4
+cfg.refinement_levels = 2
+print(cfg)
+
+mesh = GenerateMesh(cfg)
+SaveStroidMesh(mesh, "sandbox.smesh")
+print(mesh)
+