Incendiary projectiles and lava firestack reduction (#23479)

* Firestack reduction and FireStackOnHit added

* Slight lava tweak

* Remove component and tweaked incendiary pellets

* Incendiary grenade tweak

* Now ignites on projectile fixture or ignition fixture + incendiary grenade tweak

* flare shells now  ignite entities again

* Comment

* undo flare gun ignite

Resources/Prototypes/Magic/Fixtures/runes.yml

@@ -90,10 +90,21 @@
   name: "ignite rune"
   components:
     - type: TriggerOnCollide
-      fixtureID: rune
+      fixtureID: ignition
+    - type: Fixtures
+      fixtures:
+        ignition:
+          shape:
+            !type:PhysShapeAabb
+            bounds: "-0.4,-0.4,0.4,0.4"
+          hard: false
+          mask:
+          - ItemMask
+          layer:
+          - SlipLayer
     - type: DeleteOnTrigger
     - type: IgniteOnCollide
-      fireStacks: 10
+      fireStacks: 5
     - type: Sprite
       sprite: Structures/Magic/Cult/trap.rsi
       layers: