add radial gpu option (work in progress)

web/kiri/lang/en.js

@@ -323,6 +323,8 @@ self.lang['en-us'] = {
     pt_thrd_l:      ["use parallel processing when browser supports nested workers. may increase memory pressure on larger models. disable if you are getting out of memory errors"],
     pt_assy_s:      "assembly",
     pt_assy_l:      ["use web assembly when supported by browser. if you experience artifacts or memory errors, try disabling this."],
+    pt_wgpu_s:      "web gpu",
+    pt_wgpu_l:      ["use web gpu when supported by browser"],
 
     xp_menu:        "exports",