`DataScan` `count` method does not respect limit

### Apache Iceberg version

0.9.1 (latest release)

### Please describe the bug 🐞

When calling `count()` on a `DataScan`, limit is not respected. Seems trivial but if I set a limit of 5 I expect 5 or less rows back, at least with a scan-like implementation

The underlying `ArrowScan` does not get passed the limit param

https://github.com/apache/iceberg-python/blob/main/pyiceberg/table/__init__.py#L1940

This results in scans taking longer due to not respecting the limit.

The fix will involve more than just passing the limit to the `ArrowScan`

### Willingness to contribute

- [x] I can contribute a fix for this bug independently
- [ ] I would be willing to contribute a fix for this bug with guidance from the Iceberg community
- [ ] I cannot contribute a fix for this bug at this time

從 pyiceberg/table/__init__.py 第 1940 行附近開始，追蹤 DataScan.count 經過底層 ArrowScan 呼叫的執行路徑。檢查 limit 如何傳遞，並找出 issue 註記指出可能需要調整的額外掃描行為。當 count() 回傳不超過要求的 limit，同時避免不必要的掃描工作時，即視為完成。

由索引模型根據 Issue 內容生成。