Extract a summary property from all results of an inla result
extract_property(result, property, internal_hyperpar = FALSE)an inla result object
character; "mean", "sd", "mode", or some other column
identifier for inla result $summary.fixed, $summary.random$label, and
$summary.hyperpar, or "joint_mode". For "joint_mode", the joint latent mode
is extracted, and the joint hyperparameter mode, in the internal scale.
logical; if TRUE, use internal scale for
hyperparamter properties. Default is FALSE, except when property is
"joint_mode" which forces internal_hyperpar=TRUE.
named list for each estimated fixed effect coefficient,
random effect vector, and hyperparameter. The hyperparameter names are
standardised with bru_standardise_names()