replicate Npc marker component

this fixes the broken target_ui

crates/shared/src/protocol/mod.rs

@@ -15,6 +15,7 @@ use crate::{
     head::ActiveHead,
     heads::{ActiveHeads, heads_ui::UiActiveHeads},
     hitpoints::Hitpoints,
+    npc::Npc,
     platforms::ActivePlatform,
     player::{Player, PlayerBodyMesh},
     tick::GameTick,
@@ -92,6 +93,7 @@ pub fn plugin(app: &mut App) {
         .replicate::<Name>()
         .replicate_once::<Player>()
         .replicate_once::<PlayerBodyMesh>()
+        .replicate_once::<Npc>()
         .replicate::<SquishAnimation>()
         .replicate_once::<Transform>()
         .replicate::<UiActiveHeads>()