message: docs(gesture): add blurOnStart feature
diff: @@ -341,6 +341,7 @@ See our guide on implementing gesture animations: [Gesture Animations with Ionic
  | passive | `boolean \| undefined` | `true` | If true, this will indicate that the gesture will never call `preventDefault()`. This can be used to improve scrolling performance. See [Passive Listeners](https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener#Improving_scrolling_performance_with_passive_listeners) for more information. |
  | maxAngle | `number \| undefined` | `40` | The maximum angle to allow when detecting a gesture. |
  | threshold | `number \| undefined` | `10` | Defines how much a pointer must move before the gesture kicks in. |
  +| blurOnStart | `boolean \| undefined` | `undefined` | If true, the gesture will blur any active selectable element such as an input or a textarea before firing the `onStart` callback. |
  | canStart | `GestureCallback \| undefined` | `undefined` | A callback that returns true if a gesture is allowed to start. |
  | onWillStart | `(detail: GestureDetail) => Promise<void>` | `undefined` | A callback that is fires when a gesture is about to start. This is fired after `canStart` but before `onStart`. |
  | onStart | `GestureCallback \| undefined` | `undefined` | A callback that fires when a gesture has started. |
  