Dynamic Environment

## 1.2.0 (Minecraft 1.20.1, Forge 47+)

### New
- **Blizzards:** when snow starts falling somewhere cold, it can turn into a blizzard (with Serene Seasons this includes normal biomes in winter). You get a warning, then 2-5 minutes of strong gusty wind full of snow. Out in the open:
  - a whiteout closes in and you can barely see;
  - you slowly freeze, like in powder snow (any leather armour protects you, and you thaw under a roof);
  - snow drifts pile up on exposed ground (3 layers by default).

  Blizzards don't break glass, and villagers take cover. Cyclones now only come in places that aren't cold enough to snow.
- **Cyclones tear at plants and trees:**
  - Strong gusts rip out flowers, grass, ferns, dead bushes, saplings and berry bushes in the open. They drop as items, which the wind carries off. Crops are never touched.
  - Natural trees lose their bark one log at a time (Dynamic Trees branches too). Log builds are never stripped.
- **New config:**
  - a `blizzards` section: chance, length, wind strength, freezing (turn it off if Tough As Nails already handles the cold), drift height, and how far you can see;
  - new cyclone settings: `plantBlowAwayChance` and `barkStripChance`.

  Which plants blow away is set by the `dynamicenvironment:cyclone_blowable` tag, which a datapack can change.
- **New commands:** `/dynamicenvironment blizzard` (with warning), `blizzard now` and `blizzard stop`.

### Fixed
- **Server freeze (watchdog crash) after teleporting into new terrain** (for example with /rtp). Events could read chunks that were still generating, and the server waited on them until the watchdog stopped it. Events now only read fully loaded chunks.

### Important
- **Update both the server and every client.** The server and client exchange storm data in a new format, so a 1.2.0 server and a 1.1.x client won't connect.