Add reaction randomization. (#308)

* Add random products datafield to the reaciton prototype.

One of the items in the list will be used as additional products as a
result of the reaction and will be persistent per round.

Resolves #245

* Another try

Add getter and setter for the reaction products field and
add random products there.

* There is no such product as CP14BasicEffectHealHeat

* Try to visualize random products in the guidebook

* experimental recipes

* fix

* file restructurization

* Guidebook alchemy update

* Update Alchemy.xml

* fix

* Update mixing_simple.yml

---------

Co-authored-by: Ed <96445749+TheShuEd@users.noreply.github.com>

Content.Client/Guidebook/Controls/GuideReagentReaction.xaml

@@ -1,4 +1,5 @@
 <BoxContainer xmlns="https://spacestation14.io"
+              xmlns:controls="clr-namespace:Content.Client.UserInterface.Controls"
               Orientation="Horizontal"
               HorizontalAlignment="Stretch"
               HorizontalExpand="True"
@@ -26,5 +27,18 @@
                        VerticalAlignment="Center"
                        Access="Public"
                        Visible="False"/>
+        <!-- CP14 random reactions begin -->
+        <BoxContainer Name="RandomVariations"
+                      Orientation="Vertical"
+                      VerticalExpand="True"
+                      VerticalAlignment="Center"
+                      HorizontalAlignment="Left">
+            <controls:SplitBar MinHeight="10">
+            </controls:SplitBar>
+            <Label Name="RandomVariationsLabel" Text="{Loc 'cp14-guidebook-random-variations-title'}" Visible="False"/>
+            <controls:SplitBar MinHeight="10">
+            </controls:SplitBar>
+        </BoxContainer>
+        <!-- CP14 random reactions end -->
     </BoxContainer>
 </BoxContainer>