Add fn interface, troubleshooting with sectionprop

src/cytriangle/__init__.py

@@ -0,0 +1 @@
+from .functional_interface import triangulate

src/cytriangle/functional_interface.py

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+from cytriangle.cytriangle import CyTriangle
+
+
+def triangulate(input_dict, flags):
+    # parse regions
+    raw_regions = input_dict["regions"]
+    parsed_regions = []
+    for region in raw_regions:
+        parsed_regions.append(
+            {
+                "vertex": [region[0], region[1]],
+                "marker": region[2],
+                "max_area": region[3],
+            }
+        )
+    input_dict["regions"] = parsed_regions
+    input = CyTriangle(input_dict)
+    input.triangulate(triswitches=flags)
+    return input.out.to_dict()