Add an example on how to use capcons and inbox to publish/revoke an admin

[bjartek]

Issue to be solved

One pattern that is very common is to give an capability to somebody. With the introduction of inbox/capcons i feel that shis should be elaborated a bit more.

Suggest A Solution

I created a PoC repo here https://github.com/bjartek/stable-cadence/tree/give-admin

What are you currently working on that this is blocking?

Just trying to help make flow ✨

[turbolent]

@dsainati1 Could you maybe have a look at this?