Allow for permissioned token burns

[kantp]

Proposed feature

Allow the admin contract to approve burning of tokens

Why

• Allow additional actions to be performed upon burning
• Allow giving the admin control over circulation

Dependencies

As for #116, implementation of this will be much easier once o1-labs/o1js#1889 has been resolved. That feature will allow conditionally calling into the admin contract from burn(). It might be possible to implement this feature without that functionality, but only in a very clunky way (adding another method permissionedBurn(), and then disabling calls to burn() for those tokens that want the admin contract to be called.