Exposing more sorter parameters

I think it would be good to expose more parameters for sorters than we currently do, as there will be use cases where this is required.

Specifically, I need to decrease ops.NT for kilosort2 to run recordings with many channels, otherwise it fails.

How do we handle this, bit by bit as needed? It is a lot of work to do it all, but may be required in the long term.

I think bit by bit is the right approach for now. The system that Sam made makes it pretty easy to add. And the newer version of the kilosort wrappers makes it a lot easier to see how to integrate such parameters. For .NT, I think a straightforward pull request would do it.

I agrre with @magland