feat: Implement LitMotion adapter for the Tween module

[Bli-AIk]

🔗 Is your feature request related to a specific issue?

To provide developers with choices for performance and memory allocation, the framework should support multiple tweening backends. LitMotion is a modern, high-performance, zero-allocation tweening library for Unity that is an excellent alternative to DOTween.

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💡 Feature Description

• Expected outcome or effect: An alternative, high-performance tweening provider that implements the core tweening interface using the LitMotion library.
• Specific implementation ideas, such as classes, methods, parameters, or API design:
  • Create a LitMotionAdapter class that also implements the Lunar.Core.Base.ITweenManager interface.
  • This adapter will translate the abstract API calls into LitMotion's builder syntax.
  • For example, a MoveTo call would be implemented using LMotion.Create(startValue, endValue, duration).BindToPosition(transform). The adapter would need to manage the motion handles.
• Usage scenarios or benefits: Offers a modern, zero-allocation tweening option, which is ideal for performance-critical scenarios, especially on mobile, WebGL, or other resource-constrained platforms. Gives developers the flexibility to choose the tweening library that best fits their project's performance and allocation budget.
• Engine-specific context: Works best in Play mode. Targets all platforms. Recommended for the IL2CPP scripting backend to achieve maximum performance benefits.
• Engine name & version: Unity 2021.3 LTS or later.

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⚖ Alternatives Considered

N/A

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📝 Additional Information

See Lunar.Core.Base#3