feat(mod): add hello-world script mod

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

mod/content/mod.script.tl

@@ -0,0 +1,11 @@
+local mod = {}
+
+mod.preRunFn = function(_configDict : {{string, string}}, _allModParams : {string : {string : integer}}, _baseConfig : BaseConfig)
+	print("[haylan_tf3_overtake] hello from preRunFn")
+end
+
+mod.postRunFn = function(_configDict : {{string, string}}, _allModParams : {string : {string : integer}})
+	print("[haylan_tf3_overtake] hello from postRunFn")
+end
+
+return mod