[New Feature]: Can we split winget-pkgs-stable out of winget-pkgs

### Description of the new feature/enhancement

Currently the winget-pkgs moving too fast.
beta nightly packages are also published into it.
maybe we can have a repo only contains stable packages?

### Proposed technical implementation details (optional)

_No response_

Start by reviewing how winget-pkgs currently distinguishes and publishes beta, nightly, and stable packages. Define the repository split and stable-package criteria before implementation; done means the proposed stable repository can be maintained and published independently without ambiguity.

Written by the indexing model from the issue text.