Use custom types to improve the presentation of each argument in the argument list component of a nano contract transaction request by RPC

[alexruzenhack]

With the custom type we can do a better parsing of each argument and improve its presentation.

See a reference:

See implementation:

• feat: improve text input type #548

Pedro has a PR implementing the custom types on wallet desktop, see the PR: HathorNetwork/hathor-wallet#654

Note

It depends on:

• merge of https://github.com/HathorNetwork/nano-hathor-core/pull/71
• new version of wallet-lib, v1.10.0

[alexruzenhack]

The change on hathor-core was not merged yet but it is working on the staging version.