Add kpops --version command

[szymonsadowski3]

Closes #184

The ideas were taken from:

• _version.py file -> https://stackoverflow.com/questions/458550/standard-way-to-embed-version-into-python-package
• Handling the version command -> [FEATURE] Add easy --version fastapi/typer#52

Should be integrated in conjunction with the PR that changes bump action to bump the version in the new _version.py file (will paste it below in a moment)

[edit] the related ci-templates pull request can be found here bakdata/ci-templates#95

[raminqaf]

@szymonsadowski3 Thanks for your contribution! It seems that your formatting is not correct, and it breaks the CI pipeline. Could you please install the pre-commit hook for the formatting?
https://github.com/bakdata/kpops/blob/main/.pre-commit-config.yaml

[szymonsadowski3]

@szymonsadowski3 Thanks for your contribution! It seems that your formatting is not correct, and it breaks the CI pipeline. Could you please install the pre-commit hook for the formatting? https://github.com/bakdata/kpops/blob/main/.pre-commit-config.yaml

I just ran the pre-commit hooks and commited the changes accordingly :)

[raminqaf]

@szymonsadowski3 Thanks for your contribution! It seems that your formatting is not correct, and it breaks the CI pipeline. Could you please install the pre-commit hook for the formatting? https://github.com/bakdata/kpops/blob/main/.pre-commit-config.yaml

I just ran the pre-commit hooks and commited the changes accordingly :)

Thanks! I created an issue for that. We need a guideline on how externals should contribute to KPOps. #201

[disrupted]

during testing I've noticed that in local development environments reading the version dynamically from the package using importlib doesn't work, i.e. when I would run

kpops --version
poetry version patch
kpops --version

it would both times print the same version.

I've switched to the poetry bumpversion plugin and now it works as expected.