Add automated package build and publish workflow

[Copilot]

Integrates wgtechlabs/package-build-flow-action for automated NPM package versioning and dual-registry publishing (NPM + GitHub Packages).

Changes

New workflow: .github/workflows/package-build-flow.yml

• Triggers on PRs and pushes to main/dev branches
• Intelligent flow detection: generates version suffixes based on branch context (pr, dev, patch, staging, wip)
• Auto-scoped for GitHub Packages using repository owner
• Security: npm audit at high severity threshold (non-blocking)
• PR comments with installation instructions and audit results

Configuration

• Action version: v1.0.0 (not v1 - that tag doesn't exist)
• pnpm: Auto-detected from package.json packageManager field (removed explicit version to avoid conflict)
• Node.js: 20
• Permissions: packages: write, pull-requests: write

Required secrets

• NPM_TOKEN for NPM Registry publishing
• GITHUB_TOKEN (auto-provided) for GitHub Packages

The workflow will publish pre-release versions with appropriate dist-tags to prevent accidental installation of non-production builds.

Original prompt

Make a PR to dev branch and add this: https://github.com/wgtechlabs/package-build-flow-action

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