refactor: use ZodTypeAny instead of ZodType in all toValid* utilities

chore(zod): add generics to ZodTransform in all helper functions

fix(toValidArray): correct types and update tests (v2.0.1)

chore(release): v2.0.0

- Remove `toValidEnum`; enum validation is now handled via `toValidObject`.
- Update `toValidArray` defaults: `type` → `z.array(z.never())`, `strict` → `true`.
- All method options are now optional.
- Methods now support passing the type as the first argument and options as the second, or just options as the first argument.

docs: update README examples

chore: update package keywords and README title

feat(array): add strict option to toValidArray

- updated documentation for strict
- extended examples section
- fixed overloads bug in toValidObject