Match the PyPi file structure for packages

[teodora-aleksovska]

This pull request includes changes to the project's structure and file/folder names.
Please review this PR, but do not merge it until I finish testing the enabler commands. Could you confirm if the project structure is correct now?

[gocemitevski]

@teodora-aleksovska we need to satisfy of all the requirements from https://packaging.python.org/en/latest/tutorials/packaging-projects/#creating-the-package-files.

packaging_tutorial/
├── LICENSE
├── pyproject.toml
├── README.md
├── src/
│   └── example_package_YOUR_USERNAME_HERE/
│       ├── __init__.py
│       └── example.py
└── tests

Our PyPi.net organization user name - YOUR_USERNAME_HERE is keitaro-inc.

https://pypi.org/user/keitaro-inc/

[gocemitevski]

@teodora-aleksovska can't we modify the download_and_make_executable function instead of using urllib? 4ba402d#diff-bf5e4bc39b0290e2e25a951576f0e071d51c4859c3a8ae1a37301acdfdb7884aR72

Also, please use variables for values which get repeated more than once (i.e. bin/helm.tar.gz).

[teodora-aleksovska]

@teodora-aleksovska can't we modify the download_and_make_executable function instead of using urllib? 4ba402d#diff-bf5e4bc39b0290e2e25a951576f0e071d51c4859c3a8ae1a37301acdfdb7884aR72

Also, please use variables for values which get repeated more than once (i.e. bin/helm.tar.gz).

@gocemitevski please review this modification of download_and_make_executable function: fa29b54