fix(package): add repository field required for npm provenance

[nicomiguelino]

Summary

• Add repository field to package.json
• Required for npm provenance verification — publish was failing with E422 because repository.url was empty

[Copilot]

Pull request overview

This PR updates the published package metadata so npm provenance publishing can succeed in the existing release pipeline. It adds the missing repository information to package.json, aligning the npm package manifest with the GitHub source repository for this library.

Changes:

• Add a repository object to package.json.
• Set the repository type to git.
• Point the package metadata at the GitHub repository for @screenly/edge-apps.

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