[CR]Automatic food heating

[Coolthulhu]

Related to #318, part about heat pack.

How it works:

• Food can't be hot, just heatable
• When eating heatable food with an enabled heater item in crafting inventory, the heater item will be used (see below) and hot food bonus will be applied
• There are 3 ways of heating food: over fire (free), using charges, using a consumable item that is then removed
• To use charges or consumable item to heat food, you first have to enable their use for heating
• Enabled heating items have (heats) added after name
• Tiny bug introduced due to laziness: vehicle-mounted hotplate will always be enabled, yet interacting with the hotplate will allow disabling it, which won't work. That's a problem for future me.

TODO:

• Implement heating with pot+fire (free, preferred above others)
• Implement heating with hotplate (uses charges)
• Implement heating with heat packs (consumes heat pack, turns it into used heat pack or its disassembly materials) EDIT: Just removes the food pack. This was easier.
• Figure out how to handle player not wanting to consume hotplate/heat pack charges
• Heating with vehicle-mounted hotplate

Optionally rebalance food heating.

Freezing will be handled in a similar way later. Food cooler will let you use the cool bonus.