feat: add token prefixes
feat: add token prefixes

This patch adds token prefixes to access tokens (`ory_at_`), refresh tokens (`ory_rt_`), and authorize codes (`ory_ac_`). Token prefixes are useful when scanning for secrets in e.g. git repositories. Token prefixes are only issued for non-JWTs.

Closes #2845

ory/hydra,ory/hydra,ory/hydra,ory/hydra