Make packages/sdk/shared JS-environment-agnostic (Works on browser / node)

[tonyanziano]

sdk/shared needs to be made environment agnostic so that it can be imported in both browser (client, luis extension, etc.) and node projects (main).

This caused the issue #1328

[tonyanziano]

Upon further investigation this might not be possible due to that fact that sdk-shared exports the CommandServiceImpl class that depends on the uuid package (node dependency) to generate transaction ids, as well as the ConversationService which uses the uuid package to generated a bot id when starting a conversation.

A better approach might be to just separate code using node-reliant packages, such as uuid, into its own directory that is not exported at the root level via barrel files. Then any package that wants to use that code would just have to import it explicitly from that file:

import { someFunctionThatUsesNode } from '@bfemulator/sdk-shared/node'