Component expressive and theme

If the information is available we should add metadata to each component in the component list whether it's an expressive component, and what theme it's using.

#### expressive
Here is one thought on how to do expressive, but I'm afraid it's not nuanced enough. For example Masthead is productive, but if this will run true on it.
```javascript
function isExpressive() {
Boolean(getComputedStyle(document.body).getPropertyValue("--cds-container-01"))
}
```

there is also a difference between `container01` in expressive (2rem) and productive (1.5rem / container01). Might be able to leverage this.

Might also be worth talking to teams if there is a token we can contribute that says whether the component is expressive or not, or what theme it is.

> Delayed due to sunsetting feature