Changes include: * Updates response docs for `account_new`, `account_list`, `account_signTransaction` * Removes `account_import`, `account_export` docs * Adds `account_version` docs * Updates request docs for `ui_approveListing`, `ui_approveSignData`, `ui_showInfo`, `ui_showError`, `ui_onApprovedTx` * Adds `ui_approveNewAccount`, `ui_onInputRequired` docs