Get all processors to compile again

Requires splitting `serai-cosign` into `serai-cosign` and `serai-cosign-types`
so the processor don't require `serai-client/serai` (not correct yet).

processor/scheduler/utxo/primitives/src/lib.rs

@@ -4,7 +4,7 @@
 
 use core::{fmt::Debug, future::Future};
 
-use serai_primitives::Amount;
+use serai_primitives::balance::Amount;
 
 use primitives::{ReceivedOutput, Payment};
 use scanner::{ScannerFeed, KeyFor, AddressFor, OutputFor, EventualityFor, BlockFor};

processor/scheduler/utxo/primitives/src/tree.rs

@@ -1,6 +1,9 @@
 use borsh::{BorshSerialize, BorshDeserialize};
 
-use serai_primitives::{ExternalCoin, Amount, ExternalBalance};
+use serai_primitives::{
+  coin::ExternalCoin,
+  balance::{Amount, ExternalBalance},
+};
 
 use primitives::{Address, Payment};
 use scanner::ScannerFeed;