Add Fusion Core item and integrate with power armor

Introduced a new Fusion Core item with associated textures and XML definition. Updated power armor to use Fusion Cores as fuel instead of chemfuel, and added Fusion Cores to trader stock. This enhances gameplay by providing a unique, valuable resource for powering advanced equipment.

1.6/Defs/ThingDefs_Apparel/ThingDefs_Power_Armor.xml

@@ -135,13 +135,13 @@
 			</li>
 			<li Class="CompProperties_Refuelable">
 				<fuelCapacity>100</fuelCapacity>
-				<fuelConsumptionRate>20</fuelConsumptionRate>
+				<fuelConsumptionRate>0.595</fuelConsumptionRate>
 				<fuelLabel>Fusion Core</fuelLabel>
 				<fuelGizmoLabel>Fusion Core</fuelGizmoLabel>
 				<outOfFuelMessage>Needs Fusion Core</outOfFuelMessage>
 				<fuelFilter>
 					<thingDefs>
-						<li>Chemfuel</li>
+						<li>FCP_Item_Fusion_Core</li>
 					</thingDefs>
 				</fuelFilter>
 				<consumeFuelOnlyWhenUsed>true</consumeFuelOnlyWhenUsed>

1.6/Defs/ThingDefs_Items/ThingDefs_FusionCore.xml

@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<Defs>
+
+    <!--__________ Fusion Core __________-->
+
+    <!-- Fusion Core -->
+
+    <ThingDef ParentName="ResourceBase">
+        <defName>FCP_Item_Fusion_Core</defName>
+        <label>fusion core</label>
+        <description>A compact nuclear battery used to power pre-war technology, most notably power armor. These cylindrical power cells contain a highly efficient fusion reaction that can provide energy for extended periods. Extremely valuable and sought after by those who maintain pre-war equipment. Cannot be recharged with current technology.</description>
+        <graphicData>
+            <texPath>Things/Items/FusionCores</texPath>
+            <graphicClass>Graphic_StackCount</graphicClass>
+            <drawSize>0.65</drawSize>
+        </graphicData>
+        <size>(1,1)</size>
+        <resourceReadoutPriority>Middle</resourceReadoutPriority>
+        <soundInteract>Metal_Drop</soundInteract>
+        <soundDrop>Metal_Drop</soundDrop>
+        <stackLimit>10</stackLimit>
+        <useHitPoints>true</useHitPoints>
+        <statBases>
+            <MarketValue>450</MarketValue>
+            <MaxHitPoints>80</MaxHitPoints>
+            <Mass>2.5</Mass>
+            <Flammability>0.0</Flammability>
+            <DeteriorationRate>0</DeteriorationRate>
+        </statBases>
+        <thingCategories>
+            <li>ItemsMisc</li>
+        </thingCategories>
+        <drawGUIOverlay>true</drawGUIOverlay>
+        <tradeability>Sellable</tradeability>
+        <techLevel>Spacer</techLevel>
+        <tradeTags>
+            <li>ExoticMisc</li>
+        </tradeTags>
+    </ThingDef>
+
+</Defs>

1.6/Defs/TraderKindDefs/TraderKindDefs_Power_Armor.xml

@@ -66,6 +66,13 @@
                 <countRange>0~1</countRange>
             </li>
 
+            <!--__ Fusion Cores __-->
+
+            <li Class="StockGenerator_SingleDef">
+                <thingDef>FCP_Item_Fusion_Core</thingDef>
+                <countRange>2~6</countRange>
+            </li>
+
             <!--__ Currency __-->
 
             <!-- Caps -->