feat(render): add 'IEntry' type containing all possible of entries

Author: GabrielAnca

README.md

@@ -105,3 +105,4 @@ You can see that a few things are handled for you:
 - Validations on symbols and text fields are expanded to unions.
 - Non-required attributes automatically have `| null` appended to their type.
 - The output is formatted using **your** Prettier config.
+