Moved the GenderFluid Logic to be more generic

Source/Genes/Gender/Defs/GenderFluidExtension.cs

@@ -1,20 +0,0 @@
-using Verse;
-
-namespace RJW_Genes
-{
-    public class GenderFluidExtension : DefModExtension
-    {
-        /// <summary>
-        /// Number of ticks until the change can be triggered.
-        /// Just being "triggered" does not mean changing, see the changeChance below. 
-        /// </summary>
-        public int changeInterval;
-
-        /// <summary>
-        /// How high is the chance to change gender?
-        /// Set to 1 for "always", set to 0 for "never". 
-        /// Everything else is a bit statistics, but e.g. when set to .5 the chances grow per day from [50%, 75%, 82.25%, ...]
-        /// </summary>
-        public float changeChance;
-    }
-}

Source/Genes/Gender/Genes/Gene_GenderFluid.cs

@@ -39,9 +39,9 @@ namespace RJW_Genes
         private bool sexChangeWasBlocked = false;
 
         public Gene_GenderFluid() : base() {
-            GenderFluidExtension genderFluidExt = GeneDefOf.rjw_genes_gender_fluid.GetModExtension<GenderFluidExtension>();
-            change_interval = genderFluidExt?.changeInterval ?? CHANGE_INTERVAL_FALLBACK;
-            switch_chance = genderFluidExt?.changeChance ?? SWITCH_CHANCE_FALLBACK;
+            TickBasedChanceExtension tickbasedChanceExt = GeneDefOf.rjw_genes_gender_fluid.GetModExtension<TickBasedChanceExtension>();
+            change_interval = tickbasedChanceExt?.tickInterval ?? CHANGE_INTERVAL_FALLBACK;
+            switch_chance = tickbasedChanceExt?.eventChance ?? SWITCH_CHANCE_FALLBACK;
         }
 
         public override void Tick()