update structure and readme and add area

setup.py

@@ -2,35 +2,29 @@
 # -*- coding: utf-8 -*-
 from os import path
 from setuptools import setup, find_packages
+from pkg_resources import parse_version
 
 with open(path.join(path.abspath(path.dirname(__file__)), 'README.md'), encoding='utf-8') as f:
   long_description = f.read()
 
 setup(
   name="engineering",
-  version="2024.07.20",
+  version=str(parse_version("2024.07.20")),
   description="engineering tools",
   long_description=long_description,
   author="Daniel Weschke",
   author_email="daniel.weschke@directbox.de",
   package_dir={'': 'src'},
-  packages=find_packages("src"),
-  py_scripts = [
-    # mech
-    'beam.py',
-    'plate.py',
-    'tube.py',
-    # et
-    'awg.py',
-  ],
+  packages=find_packages(where="src"),
   entry_points={
     'console_scripts': [
       # mech
-      'eng-beam=beam:main',
-      'eng-plate=plate:main',
-      'eng-tube=tube:main',
+      'eng-area = engineering.area:main',
+      'eng-beam = engineering.beam:main',
+      'eng-plate = engineering.plate:main',
+      'eng-tube = engineering.tube:main',
       # et
-      'eng-awg=awg:main',
+      'eng-awg = engineering.awg:main',
     ],
   },
   keywords = 'mechanical electrical engineering mechanics plate tube stress',