support other package managers?

What package managers should this action support?

Some likely requests might be:
* Pixi
* uv
* npm and friends (note this one is frequently called from 3rd party GH actions)
* yarn

A good baseline might be to aim for equivalence between the package managers which are configured on site and those which are configured by this action?

No files or tests are named. First review how the action currently configures package managers, compare that list with the managers configured on site, and establish an agreed support scope; done requires a decided manager list and corresponding acceptance criteria.

Written by the indexing model from the issue text.