Add an example for address aliasing

[PaulRBerg]

Brief Description

The address aliasing is a fairly abstract feature.

Description of the Documentation You'd Like

Sharing an example of an L1 to L2 transaction in which the L1 address has been aliased on L2 would be helpful.

Actually: two examples, one for ORIGIN, and another for CALLER.

Links to Related Pages

https://docs.optimism.io/stack/differences#address-aliasing