Changes:
- Nerfed wind shadow a little
- Upgraded to godot 4.8, which brings big improvements to the shadows
- FPS improvements when large numbers of ships are onscreen (70+)

Fixes:
- Fixed trees when teleporting between ports
- Fixed some camera problems when teleporting between ports
- Corrected some issues with the heightmap. Ports should now be placed more accurately
- Updated collision detection in the overworld
- Added some collision safety code to prevent catastrophic explosions
- Fixed repair sounds going after death
- Improvements to boats getting stuck in the land
- Fixed some of the shoreline underwater terrain, which isn't super important but hey why not I'm in the area
- Fixed some problems with shadows
- Fixed some black pixels around the shoreline in the distance

NPC spawning is currently being ironed out internally, and should land within a couple of weeks