Kwargs: startProfileAt (#6424)

Previous:

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

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

e2e/playwright/code-pane-and-errors.spec.ts

@@ -22,7 +22,7 @@ test.describe('Code pane and errors', () => {
         `@settings(defaultLengthUnit = in)
 // Extruded Triangle
 sketch001 = startSketchOn(XZ)
-  |> startProfileAt([0, 0], %)
+  |> startProfile(at = [0, 0])
   |> line(end = [10, 0])
   |> line(end = [-5, 10])
   |> line(endAbsolute = [profileStartX(%), profileStartY(%)])