Add 2nd water control switch and sync floating key

[f1ana]

• Separated out water control functionality from spot06
• Added a 2nd switch (outside fishing against wall) to prevent being stranded. A separate hook makes sure that their pressed states sync up if one is pressed.
• Water level now persists across scenes
• Floating water key now follows the water level when changed (would stay fixed in place before)

Tried to follow existing patterns here, definitely open to feedback if I did not take the right approach.

Build Artifacts

• soh-mac.zip
• soh-windows.zip
• soh-linux.zip