@deephaven/components does not work with webpack

[mattrunyon]

Description

With #1871, we added imports from react-transition-group/Transition and react-transition-group/CSSTransition. These are not valid ESM imports (they aren't listed as imports in the react-transition-group package.json) and webpack does not like this.

Steps to reproduce

1. Create a project w/ webpack (e.g. npx create-react-app)
2. Add something like import { Button } from '@deephaven/components'; and add the component to the app.
3. Run npm start

Expected results

4. Components work

Actual results

4. Components do not work. create-react-app throws this error

Versions

• Web UI Version: 0.89.0