Export types from packages/ui-components

[samsiegart]

What is the Problem Being Solved?

ui-components doesn't export types, so building typescript dapps requires declaring the types on your own. Example issue:
Agoric/dapp-offer-up#64 (comment)

Example workaround with vite: https://github.com/Agoric/dapp-offer-up/blob/main/ui/src/vite-env.d.ts

Description of the Design

Export the types in the package so typescript packages can import ui-components without declaring types on their own

[samsiegart]

Fixed in #90