3d buildables update

This update marks a big step forward for Thrust, moving core building systems fully into 3D.

• Added 3D models as buildable structures, replacing placeholder or flat representations

• Buildables now exist as true world objects with scale, depth, and presence

• Improved visual clarity when placing structures in the environment

• Updated placement logic to better align models with terrain

• Early groundwork laid for future interaction, collision, and upgrades on 3D builds

This update shifts Thrust closer to its long-term vision: a fully immersive 3D survival and building experience where structures feel physical and intentional, not just UI elements placed in space.

More iteration coming soon as buildables gain polish, interaction, and expanded functionality.