Set traitlets application version

[soapy1]

Fixes ##977

Description

This pr set's up the traitlets application to know the current version of conda-store. Setting the version property of a traitlets Application will allow the built in trailtlets '--version' flag to work properly.

For example, running conda-store-server --version now works properly

 $ conda-store-server --version 
2024.11.1
 $ conda-store-worker --version
2024.11.1

ref:
https://github.com/ipython/traitlets/blob/main/traitlets/config/application.py#L872
https://github.com/ipython/traitlets/blob/main/traitlets/config/application.py#L200

Pull request checklist

• Did you test this change locally?
• Did you update the documentation (if required)?
• Did you add/update relevant tests for this change (if required)?

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[soapy1]

The Build and maybe upload PyPI package /... is currently a little broken, but fixed in this pr . Will rebase this pr to pick up the fix once #983 is merged