window project over limit clause is not supported

since fdfd1f29c6b0ed46a822afdd459ea17f567ccd66, window project over limit clause is not supported. Because `LimitTableHandler` is not seekable: https://github.com/4paradigm/OpenMLDB/blob/5ac4667d0e71dc803ddbd04928bc4681b5ba84b6/hybridse/src/vm/catalog_wrapper.h#L444-L448

This kind SQL might not correct.
```sql
select id, count(col) over w from (select * from t1 limit 10) window w as (....)
```

The issue points to a specific commit and the LimitTableHandler in hybridse/src/vm/catalog_wrapper.h lines 444-448. First, understand why LimitTableHandler is not seekable and how it affects window functions over a LIMIT clause. Review the SQL example and the surrounding window function implementation. Check test files for window project and limit clause usage to see what 'done' looks like.

由索引模型根据 Issue 内容生成。