Allowing dictionary under slot_was_set in the stories schema

[Imod7]

Proposed changes:

• Updating the schema file stories.yml to allow the presence of a dictionary under slot_was_set key in the stories.yml.

Current investigation:

• The validation of the yaml schemas happen in the function validate_yaml_schema at this point in the code where the validate function of the Core class (of pykwalify) is called.
• Currently, the change I did was to update the stories schema to allow a dictionary under slow_was_set by adding the type map with allowempty : True which means that it can
  have keys which are not present in the schema, and these can map to anything.
• I tried also type: "any" which also checks the stories.yml and returns it as a valid file but it feels like it undermines all the previous checks since based on the docs type any : will always be true no matter what the value is, even unimplemented types.
• I was also thinking that maybe the ideal would be to check the stories schema file in combination with the domain schema file in order to do something like if the slot is of type any in the domain, it should pass the validation check in stories but I am not sure if this is possible and how in pykwalify. If it is possible then we could also take into account the ‘influence_conversation’ value in the domain file which can affect the check in the stories schema.

The solution in this PR is related and would be affected from the progress in this ticket.

Status (please check what you already did):

• added some tests for the functionality
• updated the documentation
• updated the changelog (please check changelog for instructions)
• reformat files using black (please check Readme for instructions)

[alwx]

👍

[Imod7]

Thank you so much for the review @alwx !

Two more things :

• If you could you also take a look at the changelog I added that would be awesome! 🙏🏽
• And also I wanted to ask you if I should add a test for this change or not? It looks like a small change to add a test but maybe I should since it affects the validation process.

[alwx]

I would rephrase it a bit (e.g. "Allow to have slots with values that result to a dictionary in stories.yml and under the key slot_was_set") or at least replace "Allowing" with verb "Allow", but that's of course super minor and certainly up to you.