Config file migration decisions

Currently, we use a single config yaml file called `config.yml`.

We should consider splitting this file into three different config yaml files

| File | Contents | Notes |
| :-- | :--------- | :------ |
| `pipeline.yml` | Modular block design of pipeline steps | Depends on cytomining/profiling-recipe#11 and cytomining/profiling-recipe#12 |
| `experiment.yml` | batch and plate info, decision on whether or not to process | This is the primary reason for the config split. For large experiments, the plate and batch specifications can get huge! | Specs in #9 |
| `advanced.yml` | Anything outside of the block design and plate info | e.g. #8 |