thundercloud

Added
- Per-cloud radius override (visual, range queries and effects now share one radius)
- Configurable cloud lifecycle: custom formation / active / dissipation duration per storm
- New API: spawnCloud with radius + lifecycle params, get/set StormRadius

Improved
- Smoother formation & dissipation animations (progressive fade-in, edge-first break-up)
- Better performance when no clouds are active (skips unnecessary queries and mesh updates)
- Reduced frame drops during stable / active cloud rendering

Fixed
- Mesh cache leftover when clouds despawn early
- Client/server cloud counters not clearing correctly on world unload
- Config hot-reload race conditions between client and server

Compatibility
- Stricter version check between client and server (MATCH_VERSION)
- No entity ID, config key, or save-format changes