refactor widget as class. patch engine, frame, cli

app.js

@@ -404,6 +404,7 @@ const script = {
         "geo/mesh",
         // "moto/broker",
         "kiri/pack",
+        "kiri/utils",
         "kiri/slice",
         "kiri/layers",
         "kiri-mode/fdm/fill",
@@ -453,6 +454,7 @@ const script = {
         "geo/slicer",
         "kiri-mode/fdm/driver",
         "kiri-mode/fdm/slice",
+        "kiri/utils",
         "kiri/slice",
         "kiri/layers",
         "kiri/widget",
@@ -472,6 +474,7 @@ const script = {
         "geo/base",
         "geo/point",
         "geo/points",
+        "geo/paths",
         "geo/slope",
         "geo/line",
         "geo/bounds",
@@ -481,6 +484,7 @@ const script = {
         "load/obj",
         "load/stl",
         "kiri/conf",
+        "kiri/utils",
         "kiri/client",
         "kiri/slice",
         "kiri/layers",