Enforce typescript types in CI builds

Our CI builds don't currently fail CI builds based on TypeScript type checks. We should:

Fix current typescript errors in js plugins (should probably upgrade @deephaven/jsapi-types to 1.0.0-dev versions if possible)

Note that https://github.com/deephaven/web-client-ui/pull/2138 should fix remaining type errors in ui plugin)
Run type checks as part of CI and fail the build if there are type errors

deephaven / deephaven-plugins