Release v0.1.0

feat: add major improvements for v0.1.0

- Add refetchCurrentPage() to replace last page without duplicating
- Add uniqueBy option for automatic deduplication
- Add bi-directional pagination with getPreviousPage()
- Add AbortSignal integration to prevent race conditions
- Make refetchOnView conditions reactive with createEffect
- Add comprehensive test suite (15 new tests)
- Update documentation with examples for all new features

BREAKING CHANGE: FetcherContext now includes signal and direction properties (backward compatible in practice)