One-Sleep Timelapse

# Changelog

## 0.3.0
- **New config format & deeper customization**
  - Clearer keys, grouped behavior (UI, voting, skip rules, messages).
  - All titles/bossbar/countdown texts customizable; per-reason (night/thunder/rain) overrides.
  - Built-in **config validation & self-heal** (+ `/onesleep checkconfig`).

- **Voting system**
  - Optional **pre-skip countdown** with configurable seconds.
  - Clickable **[Cancel]** in chat during the countdown.
  - Optional **veto**: cancel requires a % of online players.

- **Rain-day skipping (opt-in)**
  - **Daytime rain bypass**: clicking a bed in normal rain registers **consent** (no sleeping required).
  - Consent counts toward the same threshold as sleepers.
  - `/onesleep consent` command for clients to register consent explicitly.

- **UI improvements**
  - Bossbar for **running** and optional bossbar for **pending countdown**.

- **Quality & fixes**
  - Suppresses vanilla sleep-skip gamerule while pending/running; restores afterwards.
  - Overworld-only safeguards; clean start/stop handling.

*(Built for servers with optional client. Singleplayer works but is less tested — please report issues/feedback.)*