[sui] More documentation on sui (#938)

Author: m30m

target_chains/sui/contracts/README.md

@@ -0,0 +1,7 @@
+# Build information
+
+Contracts are compiled with sui cli version `sui 1.0.0-09b208149` that can be installed via the following command:
+
+```commandline
+cargo install --locked --git https://github.com/MystenLabs/sui.git --rev 09b2081498366df936abae26eea4b2d5cafb2788 sui sui-faucet
+```

target_chains/sui/contracts/sources/governance/set_fee_recipient.move

@@ -1,3 +1,5 @@
+/// The previous version of the contract sent the fees to a recipient address but this state is not used anymore
+/// This module is kept for backward compatibility
 module pyth::set_fee_recipient {
     use wormhole::cursor;
     use wormhole::external_address::{Self};