Provide CLI entry point for the python packages

[tkilias]

Background

• Python provides a mechanism to install a python package as a CLI application
  • https://dev.to/bowmanjd/build-command-line-tools-with-python-poetry-4mnc
  • This means when the package get installed via pip/pipx it provides a CLI command for the shell
  • https://github.com/pypa/pipx
• This would provide an alternative for user which already use python and might want to run exaslct in docker
  • because our bash starter scripts assume host mounts, which can be problematic in already dockerized environment

Acceptance Criteria

• Add scripts section to pyproject.toml
• Maybe use it also in

  script-languages-container-tool/starter_scripts/exaslct_without_poetry.sh

  Line 24 in 3aa8ba9

  python3 -u "$PROJECT_ROOT_DIR/exasol_script_languages_container_tool/main.py" "${@}" # We use "$@" to pass the commandline arguments to the run function to preserve arguments with spaces as a single argument

• Add test case with using pip/pipx
• Test in dockerized environment