Add dev status alpha

Author: mszell

pyproject.toml

@@ -16,6 +16,7 @@ readme = "README.md"
 description = "BikeNetKit Python core utility package"
 keywords = ["Bicycle network planning", "Networks", "OpenStreetMap", "Urban Planning", "Urban Mobility"]
 classifiers = [
+    "Development Status :: 3 - Alpha",
     "Intended Audience :: Developers",
     "Intended Audience :: Science/Research",
     "Operating System :: OS Independent",