Is your feature request related to a problem? Please describe.
User can define in cedar-policy schema custom type and cedarling should have support to build this type for entity.

Describe the solution you'd like
We have defined Token Entity Metadata Schema "claim_mapping". This mapping should define how we map JWT payload attribute to cedar-policy type.

"parser": "regex" - define that mapping use regex expression.
"type": "Jans::Url" - define what type in cedar-policy schema we want to map.
"regex_expression" - is actually regexp expression
and other fields are capture names, and it's mapping to fields of cedar-policy type

Describe alternatives you've considered
Hard-code some types or how we should map it.