rev roundend shows converted count (#21854)

* add ConvertedCount field to role

* make objectives roundend title logic reusable

* change rev system + use GetTitle

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Co-authored-by: deltanedas <@deltanedas:kde.org>

Content.Server/Roles/RevolutionaryRoleComponent.cs

@@ -8,5 +8,9 @@ namespace Content.Server.Roles;
 [RegisterComponent]
 public sealed partial class RevolutionaryRoleComponent : AntagonistRoleComponent
 {
-
+    /// <summary>
+    /// For headrevs, how many people you have converted.
+    /// </summary>
+    [DataField, ViewVariables(VVAccess.ReadWrite)]
+    public uint ConvertedCount = 0;
 }