feat(component): pass createElement and Fragment components

[shortcuts]

Summary

Pass createElement and Fragment to the components returning a JSX.Element which ease the user-land code when using vanilla JavaScript.

JavaScript Example

relatedProducts({
  container: '#relatedProducts',
  searchClient,
  indexName,
  objectIDs: [selectedProduct.objectID],
  itemComponent({ item, createElement, Fragment }) {
    return createElement(Fragment, {}, createElement('span', {}, item.name));
  },
});

[francoischalifour]

We might want to pass createElement and Fragment in the FBT and RP components directly, otherwise they're not bound to these renderer props anywhere else than in our DefaultChildren component.

https://github.com/algolia/ui-components/blob/cf5586617855048d09cfe414ede458ddeace92aa/packages/react-recommendations/src/FrequentlyBoughtTogether.tsx#L40-L50

The same applies with Header and View.

Wdyt?

[shortcuts]

Good idea! Is that what you had in mind? algolia/ui-components@fac42ac

[shortcuts]

Closing this PR since we changed our implementation in #27 and #28