add volcanic terrain map with procedural alpine terrain

feat: integrate Google Earth 3D Tiles and optimize engine hooks

Implement terrain, map coordinate, and GLB collision upgrades, configure WebSockets keepalive, and fix client MapSchema callbacks TypeError

Add comprehensive unit tests for MultiplayerRoom and fix client MapSchema callbacks TypeError

Introduce structure registry and fix content loader

Fix stall physics, tracer visibility, net packet size, and type modularization

Refactor worldRenderer.ts by delegating to specialized sub-managers (CameraManager, GroundTargetRenderer, SkyZoneRenderer, HudSyncManager)

Optimize cockpit light intensity toggling to avoid shader recompilation lag and integrate cockpit and convergence features

Hide FPV propeller, optimize geometry allocations, and fix bot boundaries/turns

Scale instruments down another 25% and lower fuselage/cockpit floor

Raise falcon-mk2 cockpit camera/eye Y coordinate to 1.46

Refactor codebase to under 150 lines per file; reduce FPV turbulence and adjust cockpit scaling

Add canvas-based cockpit interior system; hide exterior mesh in FPV

Halve interior voxel size to 0.025m; redesign geometry for thin structural ribs

Redesign cockpit interior from reference diagrams; cap terrain fog edge

Add fine-scale diegetic cockpit interior system for FPV view

Fix clouds, fog edge, terrain jaggedness, atmosphere colours, and cockpit overlay

Add voxel definitions for all aircraft plus cockpit interiors

World scale, atmosphere, and tactical chart overhaul

Fix post-processing shader crash by reverting RenderTarget multisampling and enable dynamic shadow mapping to prevent sunlight from passing through the voxel shell

Add voxel aircraft system, multiplayer interpolation, live lobby preview, and online count

Fix spawn clipping, sharp vector terrain, WebGPU fallback, modifications data-unification and muzzle-booster, stall buffet av loop

Add GitHub Pages deployment and map system, physics, and renderer changes

Rework flight physics: per-wing stall, corrected inertia, gyroscopic fix, physics HUD