feat: make theme data available as ES6 modules
feat: make theme data available as ES6 modules

For each theme
* resolvedRoles, unresolvedRoles, and metadata available as ES module
exports from build/esm/unresolved
* resolvedRoles and metadata available as ES module exports from
build/esm

Typical use
```
import lightGrayMediumDensityTheme from '@hig/theme-data/build/esm/lightGrayHighDensityTheme';
```

When customizing a theme
```
import { unresolvedRoles as lightGrayTheme } from '@hig/theme-data/build/esm/unresolved/lightGrayMediumDensityTheme';
import { extendTheme, resolveTheme } from '@hig/theme-data';

const myUnresolvedRedTheme = extendTheme(lightGrayTheme, {
  "colorScheme.accentColor": { value: "#ff0000" }
});

const myRedTheme = resolveTheme(myUnresolvedRedTheme);
```

Autodesk/hig,Autodesk/hig,Autodesk/hig