Make unique energy weapons indestructible and non-flammable

Added <useHitPoints>false</useHitPoints>, <DeteriorationRate>0</DeteriorationRate>, and <Flammability>0</Flammability> to unique energy weapons in Flame, Gauss, Laser, and Plasma weapon XMLs to prevent them from deteriorating or being destroyed by fire. Also added a missing <MarketValue> to the Laser Pistol. This improves the durability and reliability of rare and prototype energy weapons.

1.6/Defs/WeaponDefs/WeaponDefs_Flame.xml

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8" ?>
+<?xml version="1.0" encoding="utf-8"?>
 <Defs>
 
     <!--__________ Energy Weapons __________-->
@@ -217,6 +217,7 @@
 
     <ThingDef ParentName="BaseGun">
         <defName>FCP_Gun_Heavy_Incinerator</defName>
+        <useHitPoints>false</useHitPoints>
         <label>Heavy Incinerator</label>
         <description>The Heavy Incinerator is a unique and devastating pre-war heavy flamethrower issued to elite Enclave Hellfire units. Built with reinforced components and an advanced fuel delivery system, it projects an intense stream of fire over considerable distances. This weapon is both a symbol of terror and a masterpiece of destructive engineering, capable of reducing enemies to ash.</description>
         <techLevel>Industrial</techLevel>
@@ -235,6 +236,8 @@
             <AccuracyMedium>0.70</AccuracyMedium>
             <AccuracyLong>0.45</AccuracyLong>
             <RangedWeapon_Cooldown>1.4</RangedWeapon_Cooldown>
+            <DeteriorationRate>0</DeteriorationRate>
+            <Flammability>0</Flammability>
         </statBases>
         <weaponTags>
             <li>FCP_Energy_Weapon</li>