Extended framework to include cloud type prediction functionality

• Extended framework previously used solely for cloud property prediction models to enable cloud type prediction as well.
• Multistep cloud model added so that cloud type can be predicted with one model and cloud type can then be used as input to cloud property prediction model.
• Added sky class based training data filtering which will filter training data such that one timesteps where the sky class (as determined by NSRDB output) agrees with the ground truth cloud type. This is done to remove mislabeled cloud types in the training data.

What's Changed

• Bnb/dev by @bnb32 in #9

New Contributors

• @bnb32 made their first contribution in #9

Full Changelog: v0.0.2...v0.0.3