Writing a tile index with STAC GeoParquet schema would be very convenient.

• Add a base_url option to pdal tindex to concatenate to the item's path
• Add id from basename of resource
• Add bbox from whatever user specified (fast or slow) bbox

pdal info myfile.las --stac produces a GeoJSON stack item for a resource when read. The code from this should be combined to a common place and used for both the GeoParquet and GeoJSON STAC variants.