Implemented Pan and Zoom on the Image Viewer.

Demo:



https://github.com/user-attachments/assets/855bafe8-fdc2-4945-9bfb-e48382264806





Closes #9584



Release Notes:

- Add zoom in/out, reset, fit-to-view and zoom-to-actual actions 
- Support scroll-wheel zoom with modifier, click-and-drag panning 
- Renders a zoom percentage overlay. 
- ImageView Toolbar Added to control zoom in/out and fit view.

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Co-authored-by: MrSubidubi <finn@zed.dev>