fix: add the export for addFontStyles parser

.changeset/silent-melons-crash.md

@@ -0,0 +1,5 @@
+---
+'@tokens-studio/sd-transforms': patch
+---
+
+Add export for addFontStyles parser.

src/index.ts

@@ -3,6 +3,7 @@ export { transforms } from './registerTransforms.js';
 
 export { expandComposites } from './parsers/expand-composites.js';
 export { excludeParentKeys } from './parsers/exclude-parent-keys.js';
+export { addFontStyles } from './parsers/add-font-styles.js';
 
 export { mapDescriptionToComment } from './mapDescriptionToComment.js';
 export { checkAndEvaluateMath } from './checkAndEvaluateMath.js';