Replace DeepForest config with hydra.

[bw4sz]

I have been working extensively with

https://hydra.cc/

which is an awesome tool for config management. I've really enjoyed it. It allows alot of great functionality for overriding parameters based on hardware, allows for easy parameter sweeps and even has a SLURM launcher

https://www.aidanscannell.com/notes/hpc-cluster/hydra/

For example see

https://github.com/weecology/BOEM/blob/1c6307d91b21195f077719376ae461d0316c7c0e/main.py#L7

https://github.com/weecology/BOEM/blob/main/conf/config.yaml

Roadmap

1. Add hydra to dependencies
2. Rename and move deepforest_config.yml to a conf/ folder.
3. Add SLURM submission tests.
4. Document on how to override config and use it in argparse like situations.

I think this is a good goal for DeepForest 2.0.

This feels like too delicate for an open-source contrib, @henrykironde you and I should probably work on this together.

Relates to #456.