AnimatedSprite2D SpriteFrames importer does not support trackpad zoom (pinch/pull) gestures

Nobody has claimed this yet.

### Tested versions

v4.2.2.stable.mono.official [15073afe3], v4.1.4.stable.mono.official [fe0e8e557], v4.3.rc2.mono.official [3978628c6]

### System information

macOS 14.6 (23G80), M2 Max, v4.2.2.stable.mono.official [15073afe3]

### Issue description

The `SpriteFrames`' sprite sheet importer does not accept the zoom (pinch/pull) trackpad gestures. The scroll gestures from the trackpad do work, as does control-scrolling the mouse wheel.

### Steps to reproduce

1. Create a new `AnimatedSprite2D` and add a new `SpriteFrames` resource.
2. On the animation pane, click on the `Add frames from sprite sheet` button and choose a sprite sheet.
3. Pinch and pull on the trackpad. The window does not zoom in or out. `Ctrl + scrollwheel` on the mouse does work.

### Minimal reproduction project (MRP)

[Animation Import Test.zip](https://github.com/user-attachments/files/16505349/Animation.Import.Test.zip)

Start with the AnimatedSprite2D SpriteFrames editor's “Add frames from sprite sheet” workflow and compare its trackpad input handling with the existing Ctrl+scrollwheel zoom behavior. Reproduce the issue on macOS using the listed steps, then verify that pinch and pull gestures zoom the sprite-sheet view while scrolling continues to work.

Written by the indexing model from the issue text.