Version 5.0.0 Released

We have been promising a large v5.0 for awhile now. That is still coming, but is now versioned as v6.0 since we needed to do this substantial breaking change release in the meantime. v6.0 still coming soon™️!
Version 5.0.0 is a backend-only release. It bumps the major version because of two breaking changes: we upgraded the backend to Node.js 24 and we removed the obsolete Hathora game server provider. The Unreal plugins and templates are unchanged from 4.2.3, so you only need to update your RedwoodBackend directory.
