feature: Refactor CI to use shared setup-uv-project action

[GreatBahram]

Description

This PR introduces a reusable composite GitHub Action to standardize uv setup across workflows.

Related Issue

Fixes #(issue number)

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

Additional Notes

[GreatBahram]

uv setups live here, and I've activated the virtual environment by default, so we don't need to prefix commands with uv.

[GreatBahram]

[johannaSommer]

Hey @GreatBahram we really appreciate the contribution! Sorry for the late response, the Pruna team was offsite for our team retreat, but now we are back in action and will have a look ASAP.

[johannaSommer]

Looks already perfect to me, really cool change it makes things a lot cleaner and less redundant!

[johnrachwan123]

LGTM! Can you rebase on to main to resolve the changes and then we merge ?

[GreatBahram]

LGTM! Can you rebase on to main to resolve the changes and then we merge ?

Thanks, @johnrachwan123! Rebased the main branch into this; feel free to merge this 🚀