Add Smoke and Foam chemical reaction effects. (#2913)

* Adds smoke reaction effect

* smoke tweaks

* address reviews

* Smoke fix

* Refactor smoke and add foam

* Fix stuff

* Remove thing

* Little things

* Address some comments

* Address more things

* More addressing

* License stuff

* Address refactor request

* Small things

* Add nullability

* Update Content.Server/GameObjects/EntitySystems/SolutionAreaEffectSystem.cs

Co-authored-by: Paul Ritter <ritter.paul1@googlemail.com>

Resources/Prototypes/Reagents/chemicals.yml

@@ -126,6 +126,15 @@
     - !type:AdjustHealth
       amount: -8
 
+- type: reagent
+  id: chem.FluorosulfuricAcid
+  name: fluorosulfuric acid
+  desc: An extremely corrosive chemical substance.
+  physicalDecs: strong-smelling
+  color: "#5050ff"
+  boilingPoint: 165
+  meltingPoint: -87
+
 - type: reagent
   id: chem.TableSalt
   name: table salt
@@ -241,3 +250,13 @@
   meltingPoint: -80.7
   tileReactions:
     - !type:FlammableTileReaction {}
+
+- type: reagent
+  id: chem.Fluorosurfactant
+  name: fluorosurfactant
+  desc: A perfluoronated sulfonic acid that forms a foam when mixed with water.
+  physicalDesc: opaque
+  color: "#9e6b38"
+  boilingPoint: 190.0 # Perfluorooctanoic Acid.
+  meltingPoint: 45.0
+