World physics update

Gameplay changes

• Implemented scalable collisions between planets and ships

• Entities (items and player) now fully collides and interacts (including gravity) with all planets and ships around it, rather than being a background decoration and needing to "switch" to it.

• Sounds can now fully be heard from planets and ships nearby

• Dropped items does not automatically stack anymore

• Made it so changing the primary action button in the settings does not affect the UI

• Slightly improved the behaviour of the vacuum gun when throwing items

Performance

• Reduced overall memory consumption by about 60~70%

• Improved performance of dropped items when there is a large number of it

Bug fixes

• Fixed memory leaks happening when reloading saves without restarting the game

• Fixed rare crash when quitting the game and many others related to audio processing and multi threading

• Fixed crash when docking to a planet

• Fixed crash when getting out of a ship and colliding with a planet during the same frame

• Fixed game crashing when using keyboard buttons unknown to GLFW

• Fixed memory leak related to displaying fruits in the inventory

• Fixed many tiles that did not drop anything

• Fixed many tiles that did not have build/dig sounds

• Fixed another crash happening when the player is exactly at position 0,0, because there is no gravity

• Fixed some tiles that could be instantly researched

• (partially) Fixed camera stuttering when jumping between worlds and ships

Misc

• Changed the architecture of the physics engine

• Many other codebase refactorings

(Version 33fb4747)