Maintenance notes

This package was statically updated for Project Zomboid B41.78.18 and B42.12-B42.19.
It has not been tested in-game from this environment.

Recommended tests:
1. SP B42.19: rain outside without umbrella/poncho should wet worn clothes.
2. SP B42.19: wet worn clothes should increase body wetness after 10 in-game minutes.
3. MP Host B42.19: the same wetness effects should be applied without client-side Lua errors.
4. Dedicated server B42.19: verify that server-side worn item wetness and body wetness are visible/synced for clients.
5. Thunderstorm: verify that thunder creates zombie-attracting world sounds using the sandbox radius.
6. B41.78.18 SP: verify that the legacy root layout still loads and applies effects.
