Release v5.0.0-alpha.13

This PR prepares the release for version 5.0.0-alpha.13.

Bump Type

• Type: prerelease
• Prerelease ID: alpha

Changes Included

• Version bumps across all changed packages

Review Checklist

• Version numbers are correct
• All tests pass
• No unintended changes included
• Review and edit draft GitHub release notes: https://github.com/sockethub/sockethub/releases/tag/untagged-0ee7c7c610621701f094

What Happens on Merge

• Packages will be published to npm with appropriate dist-tag
• Draft GitHub release will be published (must exist or merge will fail)
• Git tag will be added

⚠️ Do not include code changes in this PR - only version updates
⚠️ Do not merge until you've reviewed and polished the draft release notes