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.

src/encoding/evm/models.rs

@@ -1,20 +0,0 @@
-use tycho_core::dto::Chain;
-
-pub struct ChainId(u64);
-
-impl ChainId {
-    pub fn id(&self) -> u64 {
-        self.0
-    }
-}
-
-impl From<Chain> for ChainId {
-    fn from(chain: Chain) -> Self {
-        match chain {
-            Chain::Ethereum => ChainId(1),
-            Chain::ZkSync => ChainId(324),
-            Chain::Arbitrum => ChainId(42161),
-            Chain::Starknet => ChainId(0),
-        }
-    }
-}