chore: Linearlite - Electric sync + PGlite demo app

[samwillis]

This is a demo app demonstrating how to build a local-first app using Electric sync and PGlite. It's a clone of the Linear project management tool.

Features:

• Sync with electric
• Write through the database via a write path server src/server.ts where you can implement custom validation and conflict handling
• Merging of non-synced edits handled in database using triggers
• Postgres FTS for the search feature
• Windowed live queries synced to the windowed/virtualised scrolling so that only the rows onscreen (and a few more) are loaded

Can handle in excess of 100k issues and 500k comments.

Linearlite+PGlite-min.mp4

This version replaces #368 where the modified rows are in the same table as the synced data. This improves read performance.

[github-actions]

Built bundles:

• Postgres WASM: https://github.com/electric-sql/pglite/actions/runs/12233125505/artifacts/2292799339
• Interim build files: https://github.com/electric-sql/pglite/actions/runs/12233125505/artifacts/2292799519
• PGlite: https://github.com/electric-sql/pglite/actions/runs/12233125505/artifacts/2292844820
• Demos: https://github.com/electric-sql/pglite/actions/runs/12233125505/artifacts/2292869753

[thruflo]

What's the status on merging and deploying this?

[samwillis]

I've cherry picked out all the changes to PGlite + the sync plugin, they are now all in main with docs and testing, and most were released (just windowed live queries aren't).

I just need to rebase this on main and merge it. I'll try and pick that up tomorrow. I'll have a chat with @balegas on plan for deploying it.

[samwillis]

@balegas could I get you to review the merge logic: https://github.com/electric-sql/pglite/pull/393/files#diff-9ea8511284754ad34fc4d8ee4bf19aeb0996d57e0b22ac29589580fe7e21848a

@msfstef if you have a moment early next week could you have a skim though the app code. Versions of Linerarlite have been reviewed so many times it should be relatively cursory

[github-actions]

🚀 Deployed on https://674d78c7b97b14c75c6d5041--pglite.netlify.app

[samwillis]

This example was moved into the main Electric monorepo