Converted Python scripts into module

[AnHeuermann]

Changes

• Moved scripts into ompackagemanager module.

• Added __main__.py for a command line interface.

• Updated Jenkinsfile, so https://test.openmodelica.org/jenkins/job/Update%20Package%20Index/ should stay working.

• Update README.md on how to use the scripts.

  Usage

  > python -m ompackagemanager --help
  usage: OMPackageManager [-h] {updateinfo,genindex,generate-cache,check-missing,check-uses} ...
  
  positional arguments:
    {updateinfo,genindex,generate-cache,check-missing,check-uses}
      updateinfo          Generate up-to-date `rawdata.json`.
      genindex            Generate `index.json` from `rawdata.json`.
      generate-cache      Cache indexed libraries in directory `destination`.
      check-missing       Print all GitHub repositories missing from modelica-3rdparty for packages from `repos.json`.
      check-uses          Some help
  
  options:
    -h, --help            show this help message and exit

  > python -m ompackagemanager generate-cache --help
  usage: OMPackageManager generate-cache [-h] [--clean] destination
  
  positional arguments:
    destination  Directory to cache packages in.
  
  options:
    -h, --help   show this help message and exit
    --clean

Purpose

This enables us to add unit tests to the scripts to test a few things before changing the behaviour of the package manager.

[AnHeuermann]

Of course I broke the Jenkins job: https://test.openmodelica.org/jenkins/blue/organizations/jenkins/Update%20Package%20Index/detail/Update%20Package%20Index/8068/pipeline

+ python3 -m ompackagemanager generate-cache --clean /var/www/libraries.openmodelica.org/cache
Traceback (most recent call last):
  File "/usr/lib/python3.10/runpy.py", line 196, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "/usr/lib/python3.10/runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "/var/lib/jenkins/ws/Update Package Index/ompackagemanager/__main__.py", line 3, in <module>
    from ompackagemanager import updateinfo
  File "/var/lib/jenkins/ws/Update Package Index/ompackagemanager/updateinfo.py", line 1, in <module>
    import OMPython
ModuleNotFoundError: No module named 'OMPython'
script returned exit code 1