QOL update from reading feedback by Chinese userbase.
- Added a Sneak+Click pickup method
- Rotten Flesh pickup mechanic is now considered a easter egg
- Added new pickup tutorial advancement
- Old pickup tutorial advancement is now an easter egg advancement
- Fumo's can no longer be mass fed for noise spam
- Fumo's now float in water gracefully instead of shooting upwards from misconfigured AI
- Added a solid block check to prevent fumo's being placed in walls