chore: Make jecs a dependency, bump jecs to v0.3.0

+ Make jecs a wally dependency instead of a file in lib. This wasn't done earlier due to wally packages not being able to be used outside of Roblox without dynamically requiring them. Now, a script is used to download the latest source of jecsfrom Github associated with the version in the manifest.

+ Bump jecs-utils to v0.1.3 and release

lib/command_buffer.luau

@@ -1,6 +1,6 @@
 --!strict
 --!optimize 2
-local jecs = require("./jecs")
+local jecs = require("@jecs")
 type entity<T = nil> = jecs.Entity<T>
 type id<T = nil> = jecs.Id<T>
 

lib/handle.luau

@@ -1,6 +1,6 @@
 --!strict
 --!optimize 2
-local jecs = require("./jecs")
+local jecs = require("@jecs")
 type entity<T = nil> = jecs.Entity<T>
 type id<T = nil> = entity<T> | jecs.Pair
 

lib/init.luau

@@ -1,6 +1,6 @@
 --!strict
 --!optimize 2
-local jecs = require("./jecs")
+local jecs = require("@jecs")
 
 local WORLD = require("./world")
 local collect = require("./collect")

lib/ref.luau

@@ -1,10 +1,10 @@
 --!strict
 --!optimize 2
 local handle = require("./handle")
-local jecs = require("./jecs")
+local jecs = require("@jecs")
 local WORLD = require("./world").get
 
-local refs: { [jecs.World]: { [any]: jecs.Entity } } = {}
+local refs: { [jecs.World]: { [any]: jecs.Entity<any> } } = {}
 
 --- Gets an entity the given key references to.
 --- If the key is nil, an entirely new entity is created and returned.

lib/replicator.luau

@@ -1,6 +1,6 @@
 --!strict
 --!optimize 2
-local jecs = require("./jecs")
+local jecs = require("@jecs")
 type entity<T = nil> = jecs.Entity<T>
 type i53 = number
 

lib/world.luau

@@ -1,6 +1,6 @@
 --!strict
 --!optimize 2
-local jecs = require("./jecs")
+local jecs = require("@jecs")
 
 local WORLD: jecs.World