[Secondary] Replace Player Primitive Capsules with Duck Character Models

[MeriAlguero]

[Secondary] Replace Player Primitive Capsules with Duck Character Models

Priority: Secondary / Visual
Labels: visuals, models, enhancement, secondary

Summary

Replace the 3D capsule primitives used for Player 1 and Player 2 with low-poly/simple 3D duck models (or duck prefabs). Update the unit spawning and rotation logic so the models align properly on grid tiles.

Tasks

• Import/create a simple 3D duck model or prefab (e.g., Low-Poly Duck FBX / Asset Store / Procedural Primitive Group).
• Update GridManager / PlayerSpawner to instantiate the DuckPlayer prefab instead of PrimitiveType.Capsule.
• Configure distinct visual identifiers for P1 and P2 ducks (e.g., P1 Red Duck material, P2 Blue Duck material, or accessory caps).
• Adjust model scale, pivot point, and height offset to sit flush on top of grid tiles.
• Ensure unit selection highlights (e.g., outline or base ring) attach cleanly to the duck models.
• (Optional) Add basic directional rotation so the duck model faces its movement target tile.

Acceptance Criteria

• Game initializes with 3D duck models on starting tiles instead of capsules.
• Player 1 and Player 2 ducks are easily distinguishable by color or material.
• Selecting and moving a duck unit functions identically to the previous movement system.
• Duck models snap correctly to tile centers without clipping into the floor or floating.