Add functionality to rename accounts in a wallet

[andreacorbellini]

Summary

Added a new RPC endpoint to rename accounts, and the corresponding CLI command.

Testing Plan

CLI:

$ ironfish wallet:create test-1
Creating account test-1
Account test-1 created with public address ...

$ yarn start wallet:accounts
default
test-1

$ yarn start wallet:rename test-1 test-2
Account test-1 renamed to test-2

$ yarn start wallet:accounts
default
test-2

RPC:

$ curl -s http://127.0.0.1:8021/wallet/getAccounts
{"status":200,"data":{"accounts":["default","test-1"]}}

$ curl -s http://127.0.0.1:8021/wallet/rename --json '{"account":"test-1","newName":"test-2"}'
{"status":200}

$ curl -s http://127.0.0.1:8021/wallet/getAccounts
{"status":200,"data":{"accounts":["default","test-2"]}}

Documentation

iron-fish/website#459

Breaking Change

Not a breaking change