Implement (R)eading e-book requirements, fix etransfer_rate segfault

[ShnitzelX2]

Summary

Bugfixes "implement (R)eading e-book requirements, fix etransfer_rate segfault"

Purpose of change

Closes #79011 (this was before the overhaul, but still relevant)

Reading e-devices from the (R)ead menu doesn't consume power or take into account e-device status (browsed/power/usable).

Also, somebody mentioned an error reading off of a camera on Discord, so I fixed that and added a debugmsg precaution (sorry about your save).

Describe the solution

• Make reading off of an e-device require: "has power", "is browsed", and "is a usable e-device"
• Make reading off of an e-device pass the e-device as a parameter to read() so that power is consumed
• Fix a segfault related to division by 0 for uninitialized etransfer_rate, add a debug message if an item that should have etransfer_rate is missing it

Describe alternatives you've considered

Testing

• Read normal book
• Stored book on phone and read it, noted power loss
• Ran phone out of power and confirmed book could not be read; did the same with AR bionic, atomic smartphone
• Moved book to memory card and confirmed book could not be read (this may be desirable in the future, out of scope for now)
• Confirmed files on an unbrowsed device could not be read
• Made sure camera could transfer files

Additional context

The "study from books in order" NPC activity does not account for e-books, and it should also have been broken before the e-storage overhaul.

I think I'm comfortable enough with the e-storage infrastructure now to move on to adding more item groups, so expect that next.

[adres4t-1]

and it should also have been broken before the e-storage overhaul - I'm not sure this is relevant, but it was working pretty well with all the devices, my NPC's were reading fine. Until bateries run out.