feat: Take Chain object containing native/wrapped addresses

- This way this chain object contains everything we need, we don't need to worry about doing any transformation or calling any supplementary functions inside any of the encoders
- Needed to move our new Chain object to a higher level since this is used in the higher-level encoder traits. This required some weird default values in the constants in order to avoid using alloy's hex literal. I could have instead opted to make Bytes parse a string I think, though this would mean possibly returning an error at the constants level, which is not nice either.

Question:
- Do we want the user to be in charge of passing the native and wrapped token every single time? This may be a bit annoying for the user. For now, I have defaulted to those in constants.rs, this would take 5 mins to remove though if you don't like it, and it would get rid of this complicated bytes initialization.

Cargo.toml

@@ -19,6 +19,7 @@ alloy = { version = "0.9.2", features = ["providers", "rpc-types-eth", "eip712",
 alloy-sol-types = { version = "0.8.14", optional = true }
 alloy-primitives = { version = "0.8.9", optional = true }
 tycho-core = { git = "https://github.com/propeller-heads/tycho-indexer.git", package = "tycho-core", tag = "0.46.0" }
+once_cell = "1.20.2"
 
 [dev-dependencies]
 rstest = "0.24.0"