feat: user data stored in vault

[grumbach]

• UserData can now be stored on the Network in a Vault so no need to keep addresses and register keys around
• JS bindings to get_user_data_from_vault and put_user_data_to_vault allowing the webapp to make use of this
• Autonomi API still offers lower level APIs to create custom vaults. To differenciate those a u64 hash of the app name is used in Scratchpad
• Chose to allow UserData to include names for data we keep track of: namely Registers and Archives. Although it is optional.
• Improved the API of vault which returned clunky options instead of managing underlying errors
• exposed Bytes used throughout sn_protocol's API as higher level libs should were using the original lib leading to possible future problems if the dependencies versions mismatch