Update compilation procedure

Running setup.py directly is deprecated:

        ********************************************************************************
        Please avoid running ``setup.py`` and ``easy_install``.
        Instead, use pypa/build, pypa/installer or other
        standards-based tools.

        See pypa/setuptools#917 for details.
        ********************************************************************************

manage.sh

@@ -216,7 +216,7 @@ function download_test_db {
 }
 
 function compile_cython_components {
-    python setup.py develop
+    pip3 install -e .
 }
 
 function compile_and_test {

pyproject.toml

@@ -0,0 +1,17 @@
+[project]
+name         = "invisible_cities"
+version      = "0.1.0"
+description  = "NEXT blah blah"
+license      = {text = "TODO"}
+
+[build-system]
+requires = [ "setuptools>=75"
+           , "cython>=3.0"
+           , "numpy>=2.1"
+           , "wheel"
+           ]
+
+build-backend = "setuptools.build_meta"
+
+[tool.setuptools]
+packages = ["invisible_cities"]

setup.py

@@ -3,18 +3,27 @@
 from os import path
 from subprocess import check_output
 import numpy
+
 numpy_include = path.join(path.dirname(numpy.__file__), 'core/include')
 
 
+version = ( check_output('git describe --tags --always'.split())
+          .decode()
+          .split("-")[0]
+          .removeprefix("v")
+          )
+
+files      = "invisible_cities/*/*.pyx"
+directives = dict(language_level=3, embedsignature=True)
 
 setup(name         = 'invisible cities',
-      version      = check_output('git describe --tags --always'.split()).decode(),
+      version      = version,
       description  = 'NEXT blah blah',
       url          = 'https://github.com/nextic/IC',
       author       = 'NEXT collaboration',
       author_email = 'nextic@TODO.org',
       license      = 'TODO',
       packages     = ['invisible_cities'],
-      ext_modules  = cythonize('invisible_cities**/*.pyx'),
-      include_dirs = [numpy_include],
+      ext_modules  = cythonize(files, compiler_directives=directives),
+      include_dirs = [numpy.get_include()]
 )