Price of food depends on its nutritional capacity (#11752)

Co-authored-by: metalgearsloth <31366439+metalgearsloth@users.noreply.github.com>
fixes https://github.com/space-wizards/space-station-14/issues/11464

Resources/Prototypes/Entities/Objects/Consumable/Food/food_base.yml

@@ -15,7 +15,7 @@
   - type: Sprite
     netsync: false
   - type: StaticPrice
-    price: 50
+    price: 0
 
 # This base type is used to cover all of the "obvious" things that should be doable to open-package food.
 # Practically this means injection.

Resources/Prototypes/Entities/Objects/Consumable/Food/snacks.yml

@@ -389,6 +389,8 @@
     - Trash
   - type: Recyclable
   - type: SpaceGarbage
+  - type: StaticPrice
+    price: 0
 
 - type: entity
   noSpawn: true

Resources/Prototypes/Reagents/Consumable/Food/food.yml

@@ -15,6 +15,7 @@
     amount: 1
   - !type:PlantAdjustHealth
     amount: 0.5
+  pricePerUnit: 2
 
 - type: reagent
   id: Vitamin
@@ -37,6 +38,7 @@
       - !type:ModifyBleedAmount
         amount: -0.25
       - !type:SatiateHunger #Numbers are balanced with this in mind + it helps limit how much healing you can get from food
+  pricePerUnit: 2.5
 
 - type: reagent
   id: Protein
@@ -57,4 +59,5 @@
       - !type:ModifyBloodLevel
         amount: 1 # weaker than iron but pretty good all things considered
       - !type:SatiateHunger
+  pricePerUnit: 3