Support optional Parquet page index writes

## Feature Request / Improvement

PyIceberg doesn't expose Parquet page index writing, even though PyArrow supports it with `ParquetWriter(write_page_index=True)`.

### Use case / motivation

Page indexes let readers such as ClickHouse skip non-matching pages during predicate evaluation, avoiding decoding work for selective queries. Tables written by PyIceberg currently lack these indexes, so page-level pruning is not possible regardless of reader support.

### Proposed change

Add an opt-in `write.parquet.page-index-enabled` table property, default false, to preserve current output and file sizes. When enabled, PyIceberg passes `write_page_index=True` to PyArrow's ParquetWriter.

### Implementation

PR #3829 adds the table property, threads it through `_get_parquet_writer_kwargs`, documents it in mkdocs/docs/configuration.md, and includes unit and integration test coverage.

### Tooling note

I developed this with assistance from DS v4 Pro and reviewed the changes myself.

### References

- #3829

Comienza revisando PR #3829 y, después, inspecciona _get_parquet_writer_kwargs, mkdocs/docs/configuration.md y las pruebas unitarias y de integración mencionadas. Se considera terminado cuando la propiedad opt-in sigue siendo false de forma predeterminada, habilita la escritura del índice de páginas de PyArrow cuando es true y las pruebas documentadas pasan.

Escrito por el modelo de indexación a partir del texto del issue.