Create an empty live tournament pipeline
Examples
# Simple tournament with auto-advance
teams <- c("Lions", "Bears", "Eagles", "Wolves")
trn <- tournament(teams) |>
round_robin("groups") |>
single_elim("finals", take = top_n(2))
# Manual advance mode
trn_manual <- tournament(teams, auto_advance = FALSE) |>
swiss("open", rounds = 3)
