Implement `PolicySet::to_json` and `PolicySet::from_json`

[0x00A5]

Category

User level API changes

Describe the feature you'd like to request

Both Policy and policy Template have to and from JSON implementations. It would be nice to also have them under PolicySet. The JSON representation of a policy set shall contain the following fields, policies, templates and links.

Describe alternatives you've considered

None :)

Additional context

No response

Is this something that you'd be interested in working on?

• 👋 I may be able to implement this feature request
• ⚠️ This feature might incur a breaking change