Kwargs: startProfileAt (#6424)

Previous:

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

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

e2e/playwright/debug-pane.spec.ts

@@ -18,7 +18,7 @@ test.describe('Debug pane', () => {
     homePage,
   }) => {
     const code = `sketch001 = startSketchOn(XZ)
-    |> startProfileAt([0, 0], %)
+    |> startProfile(at = [0, 0])
   |> line(end = [1, 1])
   `
     const u = await getUtils(page)