feat(pack): add Noisium (server-side worldgen optimization)

Noisium speeds up chunk-generation noise, reducing worldgen lag spikes for clients. Server-side only; Chunk pregen (Chunky/DH) benefits too.

index.toml

@@ -464,6 +464,11 @@ file = "mods/natures-compass.pw.toml"
 hash = "35acdf433fe8f8599f59975e848efdb717663c2c471d3a5dc18743799795a736"
 metafile = true
 
+[[files]]
+file = "mods/noisium.pw.toml"
+hash = "d424a9260ef51bc102e56f0423d91dfabb739ccca8a86eb1c450ea631b739280"
+metafile = true
+
 [[files]]
 file = "mods/nullscape.pw.toml"
 hash = "dcfbfa39abeaba554c2c5323f9b9a3ec58dfc386aca2d237f73948abdbdc7125"