Combine all AgileTs hooks into `@agile-ts/react`

[Benno]

🐛 Bug report

🤖 Current Behavior

Only the hooks related to AgileTs State Management are located in the @agile-ts/react package.

🎯 Expected behavior

Also React hooks like useMultieditor(), useEvent() should be located in the @agile-ts/react package.

import {useEvent} from '@agile-ts/react/event';
import {useMultieditor} from '@agile-ts/react/multieditor'