Mining rebalancing

- Reorganized mining equipment locker list, repriced some things for balance
- Mining manual scanner is back, miners start with it by default
- Advanced automatic scanner is still available, but you must purchase it from the equipment locker or use your redemption voucher for it
- Advanced mining scanner cooldown reduced to increase its value over the manual scanner
- Resonator replaced with normal mining drill for redemption voucher (the resonator mined almost as fast as a sonic jackhammer ffs)
- Mining jetpack now has a little more than half the capacity of a normal CO2 jetpack(40 instead of 70), but you can now fit it in your backpack to give it some worth
- Mining borg drill speed reduced, now not completely superior to actual miners in almost every way
- Removed an unused item that had no sprite (sledgehammer)
- Fixed some descriptions
The item sprites were renamed mining0 and mining1 for off/on.