Add AntMan scaling, ghost trail and test prefab

Introduce a set of test tools and demo assets for an AntMan-style scaling effect:

- Add AntManScaleController: handles smooth scale transitions (absolute/relative modes), pivot preservation, queued toggles and events.
- Add GhostTrailEmitter and GhostTrailGhost: spawn fading ghost meshes (supports skinned mesh baking, material fallback, lifetime and pooling limit).
- Add GKTInventoryScaleToggle: inventory-gated input wrapper to toggle scale with optional Ctrl bypass and auto reference resolution.
- Add AntManTestSceneBootstrap and TestBootstrap prefab to quickly construct a test scene (cube, light, camera) with components configured.
- Add AntManScaleTest scene and related prefab/meta files, plus .vsconfig for Unity workload.
- Update SampleScene LFS pointer (scene file checksum/size).

These changes provide a reusable demo and components to test scaling visuals and interactions during development.

Assets/Game/Test/Scripts/GhostTrailGhost.cs.meta

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