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/Scenes/SampleScene.unity

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:e2e2ba4c3e81e5a0614568e37712497dff43ad0c82ea50aa0ffd84a962796768
-size 43402298
+oid sha256:6c78b30f04395b661117cda55d07f644824651c319ce0262450d07db870f4ac4
+size 43409826