feat: create ci-package-manager.yml

[lumirlumir]

Prerequisites checklist

• I have read the contributing guidelines.

What is the purpose of this pull request?

In this PR, I've added the ci-package-manager.yml reusable workflow.

The original name ci-build-all-pm.yml was somewhat unclear to me about what the workflow does, so I renamed it to ci-package-manager.yml to better reflect its purpose. (Other name suggestions are also welcome, if exists.)

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I've tested this workflow in the JSON repository (eslint/json#169), and it appears to be working well:

What changes did you make? (Give an overview)

In this PR, I've added the ci-package-manager.yml reusable workflow.

Related Issues

Ref: #4

Is there anything you'd like reviewers to focus on?

• Question: Should this workflow be able to check monorepo setups like the js or rewrite repositories? If so, I can update the workflow to support that.