Kwargs: startProfileAt (#6424)

Previous:

```
startProfileAt([x, y], %)
startProfileAt([x, y], sketch001)
```

New:
```
startProfile(%, at = [x, y])
startProfile(sketch001, at = [x, y])
```

rust/kcl-lib/common.kcl

@@ -12,7 +12,7 @@ export fn buildSketch = (plane, offset) => {
   w = width()
   h = height()
   return startSketchOn(plane)
-  |> startProfileAt(offset, %)
+  |> startProfile(at = offset)
   |> line(end = [w, 0])
   |> line(end = [0, h])
   |> line(end = [-w, 0])