Custom tokens

• Custom tokens held by user can be retrieved by get_user_held_custom_tokens function.
• Custom tokens created by user can be retrieved by get_user_created_custom_tokens function.
• Current user balance per token can be retrieved by get_token_balance function.
• Custom token can be transferred via SendUiCommand.
• Any additional data on custom token can be retrieved via query_tokenization_block function.
• Other custom token commands can be executed via TokenUiCommand and compose_token_command function.