chore(poc): update PoC to use new WASM interface (SQL-3170)

[nicholascioli]

Description

This PR updates the existing WASM PoC code to use the new interface introduced by the schema builder library work.

Note that this will not work as is until the schema manager wasm bundle gets packaged and deployed to NPM.

Checklist

• New tests and/or benchmarks are included
• Documentation is changed or added
• If this change updates the UI, screenshots/videos are added and a design review is requested
• If this change could impact the load on the MongoDB cluster, please describe the expected and worst case impact
• I have signed the MongoDB Contributor License Agreement (https://www.mongodb.com/legal/contributor-agreement)

Motivation and Context

• Bugfix
• New feature
• Dependency update
• Misc

Open Questions

Dependents

Types of changes

• Backport Needed
• Patch (non-breaking change which fixes an issue)
• Minor (non-breaking change which adds functionality)
• Major (fix or feature that would cause existing functionality to change)

[paula-stacho]

Hi @nicholascioli, I understand the new lib is not published yet (I recall the plan was that we'd cover the publishing), but have you tested this with a linked package? If not I can try it out