test(motion): add performance benchmark for spring vs linear easing at 60fps #3289

Summary of What Needs to be Done

Add a performance benchmark test to packages/motion/src/ that compares the execution time of spring easing, linear easing, and easeInOut easing at simulated 60fps render cycles (16.67ms per frame).

Changes that Need to be Made

• Create packages/motion/src/easing-benchmark.test.ts
• Benchmark spring() animation tick (one frame) vs linear() tick vs easeInOut() tick
• Run 10,000 iterations of each and record average time per tick
• Assert that all three complete within reasonable time bounds (< 1ms per tick)

Impact that it would Provide

• Provides quantitative evidence of animation performance characteristics
• Helps detect performance regressions in easing implementations
• Documents expected performance envelope for CI regression checks

Note: Please assign this issue to the tmdeveloper007 account.