refacto hint id

[ClementWalter]

Why

Currently, we use a single raw snake_cased_name string as hint it and match this string both in python and in rust. This is limiting to have more generic hints like memory[ap + i] = const where we currently need one hint per i.

What

Make hints parametrized as Cairo 1 hints are, see also https://github.com/starkware-libs/cairo/blob/40a7b60687682238f7f71ef7c59c986cc5733915/crates/cairo-lang-runner/src/casm_run/mod.rs#L1681

How

Consider that the raw string is a json string and not just an idea. serde this string both in python and rust to get the hint implementation.