[Feature request] Inline ModelAdmin to configure claims filters and rewrites

[peppelinux]

Hi, very lovely project, I absolutely have to implement this soon as possibile!
I was wondering about the opportunity to configure policy and rewrite rules, for every RP/Client, directly via web admin ui.

An administrator should decide which claims give to an RP, using a multichoice element.
He should also add one or more rewrite rules to one or more claims.

I read in the official Documentation about OIDC_USERINFO and OIDC_EXTRA_SCOPE_CLAIMS functions, these rules will apply working code to all the requests of all RP. My idea is to configure filters and other rules over the claims for every RP, in the RP configuration screen.

A rewrite rule could also create a brand new claim, based on a processing of two real attributes.

This should also follow the openid-connect-federation rules, specified here:
https://openid.net/specs/openid-connect-federation-1_0.html#rfc.section.4

What's your thoughs about this?