Allow writing configuration to recipe's config directory

This is a great idea. This tool works great for themes/modules/profiles. Makes sense to support recipes as well.

Looks like the `extra` property in the `recipe.yml` can be used to contain the configuration to be exported.

So the recipe for config_devel could look like the following to incorporate this feature:

name: 'Test recipe'
extra:
  config_devel:
    install:
      - block.block.test1
      - block.block.test2

Made a first attempt at this - writing configuration works but importing back from config directory to active storage does not work but this seems to be an issue with the module.

+1 for this as a thing