fix: register the arrivals group in the lab list

Catalog.groups is a hard-coded list and did not include the arrivals catalog,
so the five new modules (112705 probe/fire, 112621 probe/fire, 84636) and
kern.ipc.lifecycle were counted in Catalog.all but invisible in the POCs tab.
Add a localized 新收录 / New arrivals group at the top; simulator screenshot
confirms all six entries render. Build 6.

Sources/Catalog.swift

@@ -720,6 +720,7 @@ enum Catalog {
 extension Catalog {
     static var groups: [(String, [ExploitModule])] {
         [
+            (tl("新收录"), arrivals),
             ("CoreGraphics", coreGraphics),
             (tl("ImageIO · 图像解析"), imageIO),
             (tl("ImageIO · 纹理与编码"), imageIO2),