feat: PGlite-sync naive resumability

[msfstef]

Creates a meta table for storing shape subscription information - uses a provided shapeKey to determine whether it should persist things and how to index the persisted shapes.

I started by automatically persisting based on things like the shape definition and the table it syncs into, but like @samwillis probably had already figured out there's complexities in mapping the shape etc that makes it hard to automatically infer how to persist it.

I propose keeping the option undocumented until we get reference counting as well, but for now adding a shapeKey would persist the shape and reset the table naively when needing to refetch.

[github-actions[bot]]

Built bundles:

• Postgres WASM: https://github.com/electric-sql/pglite/actions/runs/11031283207/artifacts/1976284734
• Interim build files: https://github.com/electric-sql/pglite/actions/runs/11031283207/artifacts/1976284790
• PGlite: https://github.com/electric-sql/pglite/actions/runs/11031283207/artifacts/1976309421
• Demos: https://github.com/electric-sql/pglite/actions/runs/11031283207/artifacts/1976321179

[github-actions[bot]]

🚀 Deployed on https://66f3e98c9c487448484f1494--pglite.netlify.app

[samwillis]

@msfstef This is all really awesome!! Only those two comments.