Typography level components to be made

Some low level components should be created to ensure typographic consistency is held throughout a project of given themes. These should probably not be a 1:1 mapping with the HTML elements, but instead a high level language to convey the presentation for text, with a prop that allows the host component to be specified.

```
<>
Hello world
Typography is cool!

```

Start by reviewing the existing React component library and its theme conventions; the issue does not name files, tests, or entry points. Use the Heading and Subheading JSX example to clarify the component API, supported host elements, and the typography scope. Done should mean the agreed components and behavior are implemented consistently across themes.

Written by the indexing model from the issue text.