config: add wildcard/regex support

Add wildcard/regex support for hooks used in the config file. For example, let's say I want to drop all features starting with the prefix `_mri`, the following syntax would be pretty convenient:

```json
  "pre_split_hooks": [
    {
      "type": "drop_features_explicit",
      "features": ["mri_*"]
    },
```

Currently, I have to list all the features one by one.