chore: Update development status classifier from "Planning" to "Beta"

Author: jcfr

pyproject.toml

@@ -13,7 +13,7 @@ readme = "README.md"
 license.file = "LICENSE"
 requires-python = ">=3.10"
 classifiers = [
-  "Development Status :: 1 - Planning",
+  "Development Status :: 4 - Beta",
   "Intended Audience :: Science/Research",
   "Intended Audience :: Developers",
   "License :: OSI Approved :: BSD License",