Current limitation: The Diagram component only allows zoom through mouse interactions (scroll wheel). The Zoom parameter sets only the initial zoom level and cannot be changed at runtime. There are no methods to programmatically control the viewport.

Requested feature: Add programmatic viewport control API:

1. Two-way Zoom binding:
   @bind-Zoom support with ZoomChanged event
   Event args containing OldZoom and NewZoom values
2. Viewport control methods on TelerikDiagram reference:
   SetZoomAsync(double level) — set zoom to specific level
   ZoomInAsync(double? step) — zoom in by step (default: ZoomRate)
   ZoomOutAsync(double? step) — zoom out by step
   ResetZoomAsync() — reset to initial Zoom value (100%)
   BringIntoViewAsync(IEnumerable<string> shapeIds) — pan/zoom to show specific shapes
   FitToScreenAsync() — auto-zoom to fit all shapes in viewport

Use case:
In enterprise workflow/process editors, users need navigation controls beyond mouse wheel:
Accessibility: Users with trackpads, touch screens, or motor impairments cannot easily use scroll wheel zoom
Toolbar buttons: Standard diagram tools (Visio, Draw.io, Lucidchart) provide +/−/100%/Fit buttons
Programmatic navigation: After adding a new shape, auto-scroll to show it; on search result, navigate to found shape
Keyboard shortcuts: Implement Ctrl+Plus/Minus for zoom without native support

<TelerikDiagram @ref="@DiagramRef"
                @bind-Zoom="@CurrentZoom"
                ZoomChanged="@OnZoomChanged">
    ...
</TelerikDiagram>

<TelerikButton OnClick="@(() => DiagramRef.ZoomInAsync())">+</TelerikButton>
<TelerikButton OnClick="@(() => DiagramRef.ZoomOutAsync())">−</TelerikButton>
<TelerikButton OnClick="@(() => DiagramRef.SetZoomAsync(1.0))">100%</TelerikButton>
<TelerikButton OnClick="@(() => DiagramRef.FitToScreenAsync())">Fit</TelerikButton>

@code {
    private TelerikDiagram? DiagramRef;
    private double CurrentZoom = 1.0;
    
    private async Task NavigateToShape(string shapeId)
    {
        await DiagramRef.BringIntoViewAsync(new[] { shapeId });
    }
}