feat: update valueRenderer type to accept elements as well as strings

[breynolds-dev]

resolves #317

Summary of Changes:

• Added new stories to show rendering strings (and array of strings) as well as elements
• Updated valueRenderer to accept ReactNode instead of string (ReactNode accepts a larger variety of things that can be rendered in the place of just a string:

type ReactText = string | number;
type ReactChild = ReactElement | ReactText;

interface ReactNodeArray extends Array<ReactNode> {}
type ReactFragment = {} | ReactNodeArray;

type ReactNode = ReactChild | ReactFragment | ReactPortal | boolean | null | undefined;

[harshzalavadiya]

@breynolds-dev this is great, just an small typo in file name 'stories/customm-element.stories.tsx' and this should be ready to merge

[breynolds-dev]

wow, how embarrassing. I will get this updated and pushed

Edit: I fixed the typo and squashed the commits back down