feat(sedona-gdal): add raster operations and vrt support

[Kontinuation]

Summary

• add VRT dataset support plus rasterize, rasterize-affine, and polygonize wrappers
• layer higher-level raster operations on top of the dataset/raster/vector wrapper stack
• remove raster wrapper re-export aliases so call sites import concrete module paths directly

Stack

• foundation and primitives are already merged into main via feat(sedona-gdal): add foundational wrapper utilities #696 and feat(sedona-gdal): add geometry and spatial ref primitives #695
• this branch now depends on feat(sedona-gdal): add dataset and vector/raster wrappers #699 rebased onto current main

Follow-up since primitives merged

• rebase onto the updated safe-core branch
• use GdalApi::last_null_pointer_err instead of constructing GdalError::NullPointer directly
• keep explicit module-path imports after removing raster re-export aliases

Testing

• cargo test -p sedona-gdal
• cargo clippy -p sedona-gdal -- -D warnings