Allow NPC stations to sell services and information

NPC stations should be able to sell services and info as well as contracts, goods, etc.

• Stations should be able to refine ores in exchange for either a cut of the refined ingots or space credits
• Stations should be able to make parts (basically rent out assembler - maybe one that works faster than the stock one available to players?) in exchange for space credits. Price goes up if the player cannot provide ingots to make the parts
• Stations should be able to sell power to recharge player-ship batteries. Payment would be either space credits or uranium/hydrogen (whichever the station runs on)
• As others have suggested, stations should be able to sell oxygen and hydrogen
• Stations should be able to sell GPS coordinates for good ore locations or other items of interest
• Stations should be able to sell repair services, either renting out access to a welder wall or just incorporating the popular Build And Repair mod to make repairs in place. If the player cannot supply the parts, the station can still do the repairs, but the price goes up. If the player cannot supply the ingots to make the parts, the station can STILL do the repairs, but the cost is even higher. This whole thing would require NPC stations to be exempt from the "No welding" setting of their own safe zones, but that seems like it wouldn't be hard
• Related to selling repairs, it'd be nice if a station could accept a blueprint from a player and at least pretend to "print" the item (for a fee, of course)
  
• Stations could also rent out beds, but that might be a little too mercenary

A lot of this could be done by an in-game script and a lot of jiggery-pokery, but it'd be so much easier and more immersive if it were just a built-in thing some stations could provide.

FYI I was inspired to think of all this after watching Dead Stop, from Season 2 of Star Trek Enterprise, in which the crew is forced to accept services from a mysterious and vaguely sinister automated repair station. I recommend giving it a look.

Cheers,

-BC