feat(ci): Expand testing & Draft release workflow

[aaronclong]

• https://docs.npmjs.com/trusted-publishers

Change Summary

• Adds fully scripted CI/CD with on-push PR validation and a release workflow that builds, tests, packs, and publishes artifacts.
• Introduces a tslog logger, more flexible metadata DTOs, and utilities to normalize/validate XSPF-derived payloads.
• Expands Vitest coverage with table-driven playlist/track assertions and XML-to-CBOR fixture helpers.
• Prepares the package for distribution: tightened build scripts, externalization, browser-ready Rollup outputs, and a formal Apache-2.0 LICENSE.