Converts an Automerge document to a standard R list. This is equivalent to
as.list.am_doc().
Examples
doc <- am_create()
doc$name <- "Alice"
doc$age <- 30L
from_automerge(doc) # list(name = "Alice", age = 30L)
#> $age
#> [1] 30
#>
#> $name
#> [1] "Alice"
#>