Added rules entity

Rerfactored relationships

PostFundManagement.Domain/Entities/Programme.cs

@@ -10,4 +10,6 @@ public class Programme : Models.Programme
     public virtual Portfolio? Portfolio { get; set; }
     
     public virtual Instrument? Instrument { get; set; }
+
+    public virtual ICollection<Rule> Rules { get; set; } = [];
 }

PostFundManagement.Domain/Entities/Rule.cs

@@ -0,0 +1,11 @@
+namespace PostFundManagement.Domain.Entities;
+
+[EntityTypeConfiguration<Configuration.Rule, Rule>]
+public class Rule : Models.Rule
+{
+    public virtual User? Creator { get; set; }
+
+    public virtual User? Updator { get; set; }
+
+    public virtual Programme? Programme { get; set; }
+}