[crosscode] upgrade the "btw I use Arch" mod to ccloader 3

crosscode/btw-i-use-arch-mod/ccmod.json

@@ -0,0 +1,7 @@
+{
+  "id": "btw-i-use-arch",
+  "title": "btw I use Arch",
+  "version": "0.0.0",
+  "description": "A mod for masochists like myself",
+  "prestart": "prestart.js"
+}

crosscode/btw-i-use-arch-mod/package.json

@@ -1,7 +0,0 @@
-{
-  "name": "btw I use Arch",
-  "version": "0.0.0",
-  "description": "A mod for masochists like myself",
-  "prestart": "prestart.js",
-  "preload": "preload.js"
-}

crosscode/btw-i-use-arch-mod/preload.js

@@ -1,6 +0,0 @@
-// I know that this is legacy feature provided by CCLoader way back when mods
-// weren't executed inside the game iframe's context, but it is useful
-// nevertheless because console in Chrome's devtools automatically selects
-// window.top as the execution context by default, so writing `cc.` is faster
-// than `modloader.frame.contentWindow`
-window.top.cc = window;