DOC, MAINT: description for PyPI page

* Fixes gh-59.

* As noted in the matching issue, the project description is
completely missing on our PyPI landing page, which isn't
very professional. This small patch connects our `README.md`
to fill in the content there.

* Our `README` could use some improvement, but that's a separate
matter, and this will allow it to get pulled in to the PyPI
landing page automatically moving forward.

Author: tylerjereddy

pyproject.toml

@@ -7,6 +7,7 @@ name = "gfdl"
 version = "0.2.0.dev0"
 description = "Gradient Free Deep Learning (GFDL) networks including single and multi layer random vector functional link (RVFL) networks and extreme learning machines (ELMs)"
 requires-python = ">=3.12"
+readme = "README.md"
 classifiers = [
     "Development Status :: 4 - Beta",
     "Intended Audience :: Science/Research",