things3-cli v0.5.0

• Added --completed-after and --completed-before to filter list commands by
  completion date, and a completed sort field (aliases stop, stop_date).
• Documented logbook, completed, canceled, and logtoday in the Things
  skill so agents can find completed tasks.
• Fixed today, tasks, search, and the other active list views showing to-dos left open inside completed or canceled projects, which Things hides.
• Added --repeat-count=N to stop a repeating schedule after N occurrences,
  mutually exclusive with --repeat-until. Count-based rules omit an end date
  entirely, matching Things' own encoding (rc in the recurrence rule).
• Fixed repeat anchors with a deadline: ia is now shifted by the deadline
  offset so occurrences land on the anchor weekday, and a future anchor is
  itself the first instance.
• Added repeating project support: add-project --repeat=... and
  update-project --repeat=... create or clear repeating project templates,
  matching the repeat semantics already available for todos. Repeat flags on
  projects support after-completion or schedule mode, every N units, an anchor
  date, a stop date, a repeat count, and repeating deadlines.
• things templates and things repeating now include repeating projects, not
  just repeating todos.
• Documented that Things spawns the visible current occurrence on its own
  schedule (typically a nightly pass) after a repeat template is verified.