Update build for python compat

- remove distutils deps
- add pyproject.toml
- add MANIFEST.in
- update install instructions

python_tools/setup.py

@@ -17,20 +17,36 @@
 #   with this program; if not, write to the Free Software Foundation, Inc.,
 #   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 #+
-from distutils.core import setup
-from distutils.extension import Extension
-from Cython.Distutils import build_ext
+from setuptools import setup, Extension
+from setuptools.command.build_ext import build_ext
 import numpy as np
 import os
 
-VOID_GSL=os.environ.get('VOID_GSL')
+# Optional: Use VOID_GSL environment variable if needed later in the build process
+VOID_GSL = os.environ.get('VOID_GSL')
+
+# Define extensions (you can add Cython extensions here if needed)
+extensions = [
+    # Example of a Cython extension (uncomment and modify if needed)
+    # Extension('your_extension_name', sources=['your_source_file.pyx'], include_dirs=[np.get_include()])
+]
 
 setup(
     name='vide',
     version='1.0',
-#    cmdclass = {'build_ext': build_ext},
-    include_dirs = [np.get_include()],
-    packages=
-       ['vide','vide.backend','vide.apTools', 'vide.voidUtil',
-        'vide.apTools.profiles','vide.apTools.chi2',],
+    include_dirs=[np.get_include()],  # Add NumPy include dirs
+    packages=[
+        'vide', 
+        'vide.backend', 
+        'vide.apTools', 
+        'vide.voidUtil',
+        'vide.apTools.profiles', 
+        'vide.apTools.chi2',
+    ],
+    ext_modules=extensions,  # Add extensions if needed
+    cmdclass={'build_ext': build_ext},  # Use setuptools build_ext for Cython
+    install_requires=[
+        'numpy',  # Ensure NumPy is installed
+        'cython',  # Ensure Cython is installed for building extensions
+    ],
 )