Add FilterValueRule and modify FilterRuleType

To simplify the mirroring representation of the Revit API classes within the BHoM, it's necessary to add a concrete classe, subclass of FilterRule, that
corresponds to the FilterValueRule from Revit API.
Whatever sub-class type as well as Evaluator class type will be represented in BHoM via enumeration classes assigned to the RevitFilterRule and RevitFilterValueRule
as attributes.

Revit_oM/Views/FilterRuleType.cs

@@ -8,16 +8,15 @@ namespace BH.oM.Revit.Views
 {
     public enum FilterRuleType
     {
-        EQUALS,
-        GREATER,
-        GREATER_OR_EQUAL,
-        LESS,
-        LESS_OR_EQUAL,
-        CONTAINS,
-        NOT_CONTAINS,
-        BEGINSWITH,
-        NOT_BEGINSWITH,
-        ENDSWITH,
-        NOT_ENDSWITH
+        VALUE_STRINGRULE,
+        VALUE_NUMERICRULE_DOUBLE,
+        VALUE_NUMERICRULE_ELEMENTID,
+        VALUE_NUMERICRULE_INTEGER,
+        VALUE_GLOBALPARAMASSOCIATION,
+        INVERSE,
+        CATEGORY,
+        PARAMVALUEPRESENCE_NOVALUE,
+        PARAMVALUEPRESENCE_VALUE,
+        SHAREDPARAM_APPLICABLE
     }
 }

Revit_oM/Views/FilterValueRule.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace BH.oM.Revit.Views
+{
+    internal class FilterValueRule
+    {
+    }
+}