This PR breaks the dbus proxy and interface of orb-attest into a separate crate, and deletes all other copy-pastad zbus::proxy definitions for orb-attest.
This also paves the way to mock orb-attest if we need to in tests.
I intend to repeat this same pattern for all the other dbus interfaces, if reviews are favorable.
Rebased on #227
This PR breaks the dbus proxy and interface of orb-attest into a separate crate, and deletes all other copy-pastad zbus::proxy definitions for orb-attest.
This also paves the way to mock orb-attest if we need to in tests.
I intend to repeat this same pattern for all the other dbus interfaces, if reviews are favorable.