- Migrates to use AHP types that are synced via `npx tsx scripts/sync-agent-host-protocol.ts`
- One big churn was migrating out of URIs as rich objects in the protocol.
We can't really shove our own `$mid`-type objects in there. I also explored doing a
generated translation layer but I had trouble getting one I was happy with.
- This tightens up some type safety in general and fixes some areas where vscode had
silently/sloppily diverged from the protocol types.
