feat(desktop): add Chinese village presentation prototype

[Change Nature]
- This commit adds a deterministic presentation-model feature, not MonoGame rendering.

[New Capability]
- Provide an immutable Jiangnan village scene with homes, waterways, paths, bridge, bamboo, and garden elements.
- Provide typed home transitions, four-way input mapping, tick animation, NPC styles, and Chinese stage-one labels.

[Implementation]
- Add the pure VillagePresentation module and six focused MSTest cases.
- Keep the model free of mutable global state and update only the required F# compile order.

[Impact]
- This commit affects the Desktop presentation and test projects only.
- Kernel behavior, Game.fs wiring, MonoGame drawing, and existing acceptance artifacts remain unchanged.

0 files changed, 0 insertions, 0 deletions