feat: Add spawner util

+ Added spawner utility

+ Bumped to v0.1.4

lib/init.luau

@@ -3,18 +3,26 @@
 local jecs = require("@jecs")
 
 local WORLD = require("./world")
+
 local collect = require("./collect")
 export type collect_signal_like<T...> = collect.signal_like<any, T...>
 export type collect_verbose_signal_like<D, T...> = collect.signal_like<D, T...>
+
 local command_buffer = require("./command_buffer")
 export type command_buffer = command_buffer.command_buffer
+
 local handle = require("./handle")
 export type handle = handle.handle
+
 local ref = require("./ref")
+
 local replicator = require("./replicator")
 export type replicator = replicator.replicator
 export type changes = replicator.changes
 
+local spawner = require("./spawner")
+export type spawner<T...> = spawner.spawner<T...>
+
 --- Set the world for all utilities.
 --- Should be called once per context before any utility is used.
 --- @param world jecs.World
@@ -30,4 +38,5 @@ return {
     replicator = replicator,
     ref = ref,
     command_buffer = command_buffer,
+    spawner = spawner,
 }