feat: update to lit3 to fix ssr

[daKmoR]

What I did

1. Update to lit3
2. Work during "start" but not in the production build... need to investigate

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Latest commit: fdf4cd6

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[daKmoR]

Thanks for the work on this.

Rocket has been rebuilt from a clean slate for the new @rocket/js soft launch. The old branch/PR history no longer applies to the current codebase, so I’m closing this as part of the repository reset.

This is not the full public relaunch yet. The package and docs are going live first so we can dogfood the new version on real projects, fix rough edges, and then follow up with a proper launch post, video, and release notes.

If this idea is still relevant for the new Rocket, please open a fresh issue or PR against the new main branch.

Thanks again for contributing.