suggestion: export type `SolitaConfig` 

so that users can get type annotations in their `.solitarc.js` when they do stuff like

```
/** @type {import('@metaplex-foundation/solita').SolitaConfig} */
const EXPORTS = {
  // user now has access to typed IDE prompts for each config field
}
```

Might want to export it in a new `@types/` package maybe, idk