Kwargs: startProfileAt (#6424)

Previous:

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

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

rust/kcl-lib/e2e/executor/inputs/negative_args.kcl

@@ -4,7 +4,7 @@ const length = 12
 
 fn box = (sk1, sk2, scale) => {
   const boxSketch = startSketchOn(XY)
-    |> startProfileAt([sk1, sk2], %)
+    |> startProfile(at = [sk1, sk2])
     |> line(end = [0, scale])
     |> line(end = [scale, 0])
     |> line(end = [0, -scale])