test: simplify gc testing

src/utils/collect.luau

@@ -0,0 +1,8 @@
+local function collect()
+	for _ = 1, 1e4 do
+		local _ = table.create(1e3)
+	end
+	task.wait()
+end
+
+return collect

src/utils/count.luau

@@ -0,0 +1,9 @@
+local function count(object: any): number
+	local count = 0
+	for _ in next, object do
+		count += 1
+	end
+	return count
+end
+
+return count