feat: rework modules, items and fuel

docs/WORKFORCE.md

@@ -52,7 +52,6 @@ Workers consume, per worker:
 
 - food
 - water
-- energy
 - consumer goods
 
 These should be understood using the item roles defined in [ITEMS.md](/home/jbourdon/repos/space-game/docs/ITEMS.md).
@@ -146,7 +145,6 @@ A newly founded station may begin with:
 
 It can still exist and operate at baseline efficiency, but it remains weak until supplied with:
 
-- fuel
 - workers
 - support goods
 - eventually a station commander
@@ -159,7 +157,6 @@ Relevant shortages include:
 
 - food shortage
 - water shortage
-- energy shortage
 - consumer goods shortage
 
 This gives logistics failure lasting demographic consequences.
@@ -178,7 +175,7 @@ The following rules should remain true unless deliberately revised:
 
 - population grows only at stations for now
 - habitat modules are required for growth
-- workers consume food, water, energy, and consumer goods
+- workers consume food, water and consumer goods
 - workforce affects station efficiency
 - stations retain a small baseline efficiency at zero workforce
 - population can be transported between stations