Add support for Hydro/Aero module

[Jiafeng-Xu-Aker]

Add support for Hydro/Aero module

This PR integrates Hydrodynamics/Aerodynamics module into AGXUnreal.

New classes

AGXUnreal (gameplay layer)

• UAGX_DynamicWaterComponent — Scene component representing a dynamic water body. Exposes water surface height, density, and velocity queries, and wraps a native agxModel::DynamicWater via FDynamicWaterBarrier.
• UAGX_WindAndWaterControllerSubsystemBase — Abstract UGameInstanceSubsystem that holds the agxModel::WindAndWaterController as a singleton. Provides APIs to register water geometries, enable/disable aero- and hydrodynamics on shapes and wires, and update per-shape wind/water parameters at runtime.
• UAGX_WindAndWaterAwareShapeMaterial — Extends UAGX_ShapeMaterial with FAGX_Ext_WindAndWaterParameters structs for both hydrodynamic and aerodynamic coefficients (pressure drag, viscous drag, lift, buoyancy, shape tessellation). Adds a bIsWaterGeometry flag to mark a shape as water. If this special material is not used, normal material will not interact with water.

AGXUnrealBarrier (AGX Dynamics bridge layer)

• FWindAndWaterControllerBarrier — Barrier wrapping agxModel::WindAndWaterController. Provides methods to add water geometries, set/get hydro and aero parameters on shapes and wires, and manage native lifecycle.
• FWindAndWaterParametersBarrier — Barrier for reading and writing individual wind/water parameter coefficients on a shape or wire.
• FDynamicWaterBarrier — Barrier for agxModel::DynamicWater, exposing surface height, density, and flow velocity queries.
• EWindAndWaterParametersCoefficient / EWindAndWaterShapeTessellation — Blueprint-exposed enums for coefficient type and tessellation level of non-mesh shapes (sphere, capsule, cylinder).

AGXUnrealEditor

• UAGX_WindAndWaterAwareShapeMaterialAssetFactory and AGX_WindAndWaterAwareShapeMaterialAssetTypeActions — Editor factory and type actions for creating UAGX_WindAndWaterAwareShapeMaterial assets from the Content Browser.

Other changes

• AGX_ShapeComponent: registers shapes with the WindAndWaterController subsystem on begin play when a WindAndWaterAwareShapeMaterial is assigned. Ideally ShapeComponent and WaterModule should be decoupled.
• AGX_ShapeMaterial: minor fix to CopyShapeMaterialProperties for the extension of new material type.
• SimulationBarrier: exposes the native simulation reference needed to add the WindAndWaterController to the AGX simulation.
• AGXBarrierFactories: adds factory support for the new barrier types.
• AGXRefs.h / AGXTypeConversions.h: adds native ref structs and type conversion helpers for the new AGX model types.