add command line entrypoint for campusnet

Author: frereit

setup.cfg

@@ -27,3 +27,7 @@ python_requires = >=3.7
 package_dir =
     =src
 zip_safe = no
+
+[options.entry_points]
+console_scripts =
+    campusnet = campusnet.__main__:main

src/campusnet/__main__.py

@@ -1,7 +1,8 @@
 import campusnet
 from argparse import ArgumentParser
 
-if __name__ == "__main__":
+
+def main():
     parser = ArgumentParser(
         prog="python -m campusnet", description="Get exams from CampusNet instance."
     )
@@ -104,3 +105,7 @@
                 )
         writer = csv.writer(sys.stdout)
         writer.writerows(out)
+
+
+if __name__ == "__main__":
+    main()