Small tweaks to justfile (#367)

* codegen depends on clean-add-chain

* run codegen after removing or promoting chain

Author: geoknee

justfile

@@ -11,9 +11,10 @@ add-chain:
 # Promote a standard candidate chain to a standard chain, example: just promote-to-standard 10
 promote-to-standard CHAIN:
 	go run ./add-chain promote-to-standard --chain-id={{CHAIN}}
+	just codegen
 
 # Generate auto-generated files
-codegen:
+codegen: clean-add-chain
 	go run superchain/internal/codegen/main.go
 	node ./scripts/codegen.js
 
@@ -70,3 +71,4 @@ remove-chain SUPERCHAIN_TARGET CHAIN:
 	rm superchain/extra/addresses/{{SUPERCHAIN_TARGET}}/{{CHAIN}}.json
 	rm superchain/extra/genesis-system-configs/{{SUPERCHAIN_TARGET}}/{{CHAIN}}.json
 	rm superchain/extra/genesis/{{SUPERCHAIN_TARGET}}/{{CHAIN}}.json.gz
+	just codegen