Consider adopting alloy RPC types

[Wodann]

When RPC types become part of alloy, consider adopting those in favour of our own.

Depends On:

• feat: add primitive and RPC types alloy-rs/core#51

[Wodann]

In our code, we have a preference for strongly typed static types to enforce correctness through the compiler. Alloy's RPC types are not always statically typed. E.g see this type. In addition, it would restrict our flexibility with types, so for now we're choosing not to use Alloy RPC types