suggestion: export type SolitaConfig

[billythedummy]

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