Install setuptools for Python 3.12 and newer so distutils is available.

setup.py

@@ -26,6 +26,7 @@
         'mpet.electrolyte','mpet.config'
     ],
     install_requires=['numpy','scipy','matplotlib','pyQt5', 'h5py', 'configparser', 'schema',
+                      'setuptools; python_version >= "3.12"',
                       'daetools @ https://sourceforge.net/projects/daetools/files/daetools/2.3.0/daetools-2.3.0-gnu_linux-x86_64.zip ; python_version >= "3.10" and python_version <= "3.12" and sys_platform == "linux"',
                       'daetools @ https://sourceforge.net/projects/daetools/files/daetools/2.3.0/daetools-2.3.0-win64.zip ; python_version >= "3.10" and python_version <= "3.12" and sys_platform == "win32"',
                       'daetools @ https://sourceforge.net/projects/daetools/files/Old-releases/daetools-old/1.9.0/daetools-1.9.0-gnu_linux-x86_64.tar.gz ; python_version >= "3.5" and python_version <= "3.7" and sys_platform == "linux"',