chore: export Options to better assist type checking for .prettierrc.js

Developers can now import the Options type in the .prettierrc.js file for TypeScript type checking.

For example,

```
// import prettier-plugin-jsdoc Options
/** @type {import('prettier-plugin-jsdoc').Options} } */
const prettierPluginJsdocOptions = {
  jsdocCapitalizeDescription: false,
}

// import prettier Options
/** @type {import('prettier').Options} */
const config = {
  plugins: ['prettier-plugin-jsdoc'],
  ...prettierPluginJsdocOptions,
  singleAttributePerLine: true,
  arrowParens: 'always',
}
```

src/index.ts

@@ -233,6 +233,7 @@ function mergeParsers(originalParser: prettier.Parser, parserName: string) {
 }
 
 export { options, parsers, defaultOptions };
+export declare type Options = Partial<JsdocOptions>;
 
 function normalizeOptions(options: prettier.ParserOptions & JsdocOptions) {
   if (options.jsdocCommentLineStrategy) {