feat: add dynamic sound system

[TakeABao23]

I have added a dynamic sound system and some new sound instance classes in order to facilitate the further creation of custom sounds for GC5. Every machine in the game has this functionality, though only electric-powered machines have sounds assigned to them.

(Note: This is a re-upload of an older pull request. Since the original pull request, I moved my workspace to a separate branch for cleanliness and implemented all the requested changes from the original.)

Sound System Features:

• A sound manager that handles custom looping GC5 sounds
• A generic machine sound class
• State change tracking
• State change sound modulation (fading in and out)

Machine Sounds Features:

• Unique sound that plays when the machine is powered
• Unique sound that plays when the machine is active
• Circuit scritch sounds play randomly as the Circuit Fabricator runs
• Separate (currently empty) map of sounds for coal-powered machines

Feedback sought:

• Volume: how loud are single machines? Groups of machines?
• Quality: do they sound like what they're supposed to?
• Performance: does this system hurt performance in any way?

Known issues:

• Upon relogging, sounds won't play until the machine status updates

Future Plans:

• Add more unique sounds (particularly for coal-powered machines)
• possible unique sound behaviors for different states?

[TakeABao23]

Ah it appears it won't build because it's using the MachineLib version that hasn't been committed yet

[TakeABao23]

Is there anything left with this before it could be merged?