Kwargs: startProfileAt (#6424)

Previous:

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

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

rust/kcl-lib/tests/pattern_circular_in_module/thing.kcl

@@ -1,6 +1,6 @@
 export fn thing() {
   exampleSketch = startSketchOn(XZ)
-    |> startProfileAt([.5, 25], %)
+    |> startProfile(at = [.5, 25])
     |> line(end = [0, 5])
     |> line(end = [-1, 0])
     |> line(end = [0, -5])