Allow users to delete sketches on offset planes via feature tree (#5641)

* Add sketch-on-offset plane deletion cleanup logic

* Add an E2E test for this behavior

e2e/playwright/feature-tree-pane.spec.ts

@@ -388,4 +388,52 @@ test.describe('Feature Tree pane', () => {
       })
     })
   })
+
+  test(`Delete sketch on offset plane and all profiles from feature tree`, async ({
+    context,
+    page,
+    homePage,
+    scene,
+    editor,
+    toolbar,
+    cmdBar,
+  }) => {
+    const beforeKclCode = `plane001 = offsetPlane('XY', offset = 5)
+sketch001 = startSketchOn(plane001)
+profile001 = circle(sketch001, center = [0, 20], radius = 12)
+profile002 = startProfileAt([0, 7.25], sketch001)
+  |> xLine(13.3, %)
+profile003 = startProfileAt([0, -4.93], sketch001)
+  |> line(endAbsolute = [-5.56, 0])`
+    await context.folderSetupFn(async (dir) => {
+      const testProject = join(dir, 'test-sample')
+      await fsp.mkdir(testProject, { recursive: true })
+      await fsp.writeFile(join(testProject, 'main.kcl'), beforeKclCode, 'utf-8')
+    })
+    // One dumb hardcoded screen pixel value
+    const testPoint = { x: 650, y: 250 }
+    const sketchColor: [number, number, number] = [149, 149, 149]
+    const planeColor: [number, number, number] = [74, 74, 74]
+
+    await homePage.openProject('test-sample')
+    // FIXME: @lf94 has a better way to verify execution completion, in a PR rn
+    await scene.waitForExecutionDone()
+
+    await test.step(`Verify we see the sketch`, async () => {
+      await scene.expectPixelColor(sketchColor, testPoint, 10)
+    })
+
+    await test.step('Delete sketch via feature tree selection', async () => {
+      const operationButton = await toolbar.getFeatureTreeOperation('Sketch', 0)
+      await operationButton.click({ button: 'left' })
+      await page.keyboard.press('Delete')
+      await scene.expectPixelColor(planeColor, testPoint, 10)
+    })
+
+    await test.step(`Verify the code changed`, async () => {
+      await editor.expectEditor.toContain('plane001 =')
+      await editor.expectEditor.not.toContain('sketch001 =')
+      await editor.expectEditor.not.toContain('profile002 = ')
+    })
+  })
 })