fix: export WrapperProps to fix TS2883 with declaration emit

[ThibautMarechal]

Fixes #759

What

Export WrapperProps from the main formsy-react entry point.

- export type { PassDownProps as FormsyInjectedProps, InjectedProps };
+ export type { PassDownProps as FormsyInjectedProps, InjectedProps, WrapperProps };

Why

The return type of withFormsy<T, V> is:

React.ComponentType<Omit<T & WrapperProps<V>, keyof InjectedProps<V>>>

When a project has declaration: true (or composite: true) in tsconfig, TypeScript must write this type into the generated .d.ts file. Because WrapperProps is only reachable via the internal dist/withFormsy path and not the main entry, TypeScript raises TS2883 on every exported component:

error TS2883: The inferred type of 'MyInput' cannot be named without a reference to
'WrapperProps' from '../../node_modules/formsy-react/dist/withFormsy'.
This is likely not portable. A type annotation is necessary.

Exporting WrapperProps from the main entry gives TypeScript a portable name to reference, eliminating the error without any changes required in consumer code.

Impact

• Non-breaking: purely additive type export.
• No runtime change: type-only export, zero JS output diff.
• WrapperProps is already part of the implicit public API (it describes exactly what every consumer must pass to a withFormsy-wrapped component); making it explicit is an improvement.