Experimental DataFusion integration

[emilk]

Load an .rrd from disk, then implement datafusion::TableProvider and try do some queries.

Let's not use re_arrow2 for this, but write all new code using arrow.

[teh-cmc]

More specifically, I think this should load the RRD into a ChunkStore, and then implement the DataFusion traits on top of ChunkStore.

An even better solution would be to implement the traits on top of something like StoreHub instead, in order to make cross-recording queries possible, but given the current state StoreHub and how coupled it is to the Viewer at the moment, that's probably not realistic. (Then again we are gonna need to fix that coupling at some point too.)