refactor: move model home and replica to models

rust/optics-core/bin/toy.rs

@@ -3,7 +3,7 @@ use ethers_signers::LocalWallet;
 use std::time::Duration;
 use tokio::time::interval;
 
-use optics_core::{home::Home, replica::Replica};
+use optics_core::models::{home::Home, replica::Replica};
 
 fn main() {
     tokio::runtime::Builder::new_current_thread()

rust/optics-core/src/lib.rs

@@ -8,11 +8,8 @@
 /// Accumulator management
 pub mod accumulator;
 
-/// A simple Home chain Optics implementation
-pub mod home;
-
-/// A simple Replica chain Optics implementation
-pub mod replica;
+/// Model instantatiations of the on-chain structures
+pub mod models;
 
 use ethers_core::{
     types::{Address, Signature, H256},

rust/optics-core/src/models/mod.rs

@@ -0,0 +1,5 @@
+/// A simple Home chain Optics implementation
+pub mod home;
+
+/// A simple Replica chain Optics implementation
+pub mod replica;