New gh action to pnpm i and pnpm build:all

[tdrz]

We want to run a CI action that mimics the README.md instructions as close as possible.

[github-actions]

Built bundles:

• Postgres WASM: https://github.com/electric-sql/pglite/actions/runs/13157539023/artifacts/2540560727
• Interim build files: https://github.com/electric-sql/pglite/actions/runs/13157539023/artifacts/2540560968
• PGlite: https://github.com/electric-sql/pglite/actions/runs/13157539023/artifacts/2540588899
• Demos: https://github.com/electric-sql/pglite/actions/runs/13157539023/artifacts/2540612828
• Demos: https://github.com/electric-sql/pglite/actions/runs/13157539023/artifacts/2540654176

[github-actions]

🚀 Deployed on https://67a3600f41a0230dc1e4b74c--pglite.netlify.app

[samwillis]

LGTM, happy to get this in.

We can de-duplacate the work flows later, but having this tested makes sense.

Is it worth adding a pnpm test at the end, or should we wait till we have this as the main workflow?

[tdrz]

Is it worth adding a pnpm test at the end, or should we wait till we have this as the main workflow?

Good idea, just added it, will wait for the CI and then merge.

[tdrz]

@samwillis test fail on that action... hm...

[tdrz]

@samwillis Will merge this without running the tests. Made a separate PR for that and will look into fixing it.