Export AuthCtx and JwtClaims in stdb/server typescript sdk (#4649)

# Description of Changes

Exports AuthCtx and JwtClaims so that they can be used in helper
functions for checking authentication.

# API and ABI breaking changes

None

# Expected complexity level and risk

1

# Testing

None, similar to #4567, just adding more exports

Co-authored-by: Tyler Cloutier <cloutiertyler@users.noreply.github.com>
Co-authored-by: Zeke Foppa <196249+bfops@users.noreply.github.com>

Author: 3 people

crates/bindings-typescript/src/server/index.ts

@@ -8,7 +8,7 @@ export {
 export { CaseConversionPolicy } from '../lib/autogen/types';
 export { table } from '../lib/table';
 export { SenderError, SpacetimeHostError, errors } from './errors';
-export type { Reducer, ReducerCtx } from '../lib/reducers';
+export type { Reducer, ReducerCtx, JwtClaims, AuthCtx } from '../lib/reducers';
 export type { ReducerExport } from './reducers';
 export { type DbView } from './db_view';
 export * from './query';