Add a member function `into_split` for `cedar_policy::Entity`

[0x00A5]

Category

User level API features/changes

Describe the feature you'd like to request

Add a new member function, into_split, under Entity with the following function signature:

/// Disassemble an `Entity` into its unique ID, attributes and parents.
pub fn into_split(self) -> (EntityUid, HashMap<String, RestrictedExpression>, HashSet<EntityUid>);

This function will allow users to mutate an entity's attributes and parents after splitting and then re-assemble back into a cedar_policy::Entity.

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

[aaronjeline]

Seems useful, only note is that I think the more idiomatic name would be into_inner()

[khieta]

Closed by #685