fix: Add missing types import to ViewTimeline.ts

- Fixes TypeScript compilation error where ViewTimeline interface was not available
- Required for ViewTimeline class to implement the global ViewTimeline interface

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Co-authored-by: Ivan Galiatin <trurl-master@users.noreply.github.com>

Author: claude[bot]

src/mocks/web-animations-api/ViewTimeline.ts

@@ -2,6 +2,7 @@ import {
   mockAnimationTimeline,
   MockedAnimationTimeline,
 } from './AnimationTimeline';
+import './types';
 
 type ViewTimelineAxis = 'block' | 'inline' | 'x' | 'y';