Create a bracketeer tournament specification
Examples
# Create a reusable tournament blueprint
my_spec <- spec() |>
round_robin("groups") |>
single_elim("finals", take = top_n(2))
# Build with different participant lists
trn1 <- build(my_spec, c("A", "B", "C", "D"))
trn2 <- build(my_spec, c("W", "X", "Y", "Z"))
