Fix migrations

[MinhxNguyen7]

Description

• Add migrations to repo to keep everything in sync.
• Add commit hook to generate and add migrations files.
• Add commit hook to remove references to the "public" schema in migration files that Drizzle generate.
  • Not sure why Drizzle creates entities in "public" specifically, but that prevented us from using staging.
• Throw SvelteKit errors (instead of just calling them) to get proper error messages.

Test Plan

• Verify that meeting creation works in the deployment.
• See that this also works on prod.

Issues

• Supercedes Debug meeting creation in deployment #109. Refer to it for the debugging steps.
• Closes Meeting creation doesn't work on staging #107

Future Follow-Up

• Give each staging PR a schema Separate schemas for staging instances #115.
• Document the whole setup process and potential pitfalls. Part of Document DB Deployment/Migrations Troubleshooting #87.

[seancfong]

LGTM

[seancfong]

@ecxyzzy @MinhxNguyen7 Meeting creation works on staging. Merging this to main to see if prod works.