santoku 1.1.0

• Core logic has been speeded up using raw pointers. This was vibe-coded by me
  and Claude Code. If it breaks, please file a bug report.
• The experimental chop_spikes() and dissect() functions give
  common values of x their own singleton intervals.
• On Unicode platforms, infinity will be represented as ∞ in breaks. Set
  options(santoku.infinity = "Inf") to use the old behaviour.
• Singleton breaks are not labelled specially by default in
  chop_quantiles(..., raw = FALSE). This means that e.g. if the 10th and 20th
  percentiles are both the same number, the label will still be [10%, 20%].
• When multiple quantiles are the same, santoku warns and returns the leftmost
  quantile interval. Before it would merge the intervals, creating labels that
  might be different to what the user asked for.
• chop_quantiles() gains a recalc_probs argument. recalc_probs = TRUE
  recalculates probabilities using ecdf(x), which may give more accurate
  interval labels.
• single = NULL has been documented explicitly in lbl_* functions.
• Bugfix: brk_manual() no longer warns if close_end = TRUE (the default).