Handle the disable_regnal_numbers attribute in landed titles

ImperatorToCK3/CK3/Titles/Title.cs

@@ -1139,6 +1139,7 @@
 	[SerializedName("posthumous_regnal_female_names")] public StringOfItem? PosthumousRegnalFemaleNames { get; private set; }
 	[SerializedName("personal_relation_entry")] public StringOfItem? PersonalRelationEntry { get; private set; }
 	[SerializedName("personal_relation_vassal")] public StringOfItem? PersonalRelationVassal { get; private set; }
+	[SerializedName("disable_regnal_numbers")] public bool? DisableRegnalNumbers { get; set; }
 
 	public int? GetOwnOrInheritedDevelopmentLevel(Date date) {
 		// Latest date (<= date) takes precedence.
@@ -1225,6 +1226,7 @@
 		parser.RegisterKeyword("posthumous_regnal_female_names", reader => PosthumousRegnalFemaleNames = reader.GetStringOfItem());
 		parser.RegisterKeyword("personal_relation_entry", reader => PersonalRelationEntry = reader.GetStringOfItem());
 		parser.RegisterKeyword("personal_relation_vassal", reader => PersonalRelationVassal = reader.GetStringOfItem());
+		parser.RegisterKeyword("disable_regnal_numbers", reader => DisableRegnalNumbers = reader.GetBool());
 
 		parser.RegisterRegex(CommonRegexes.Catchall, (reader, token) => {
 			IgnoredTokens.Add(token);
@@ -1526,62 +1528,62 @@
 		}
 	}
 
 	private void AppointCouncilMembersFromImperator(ReligionCollection religionCollection,
 		Dictionary<string, string[]> councilPositionToSourcesDict,
 		List<OfficeJob> convertibleJobs,
 		HashSet<string> alreadyEmployedCharacters,
 		Character ck3Ruler,
 		Date irSaveDate) {
 		Dictionary<string, int> heldTitlesPerCharacterCache = [];
 
 		foreach (var (ck3Position, sources) in councilPositionToSourcesDict) {
 			// The order of I:R source position types is important - the first filled one found will be used.
 			foreach (var sourceOfficeType in sources) {
 				var job = convertibleJobs.Find(o => o.OfficeType == sourceOfficeType);
 				if (job is null) {
 					continue;
 				}
 
 				var ck3Official = job.Character.CK3Character;
 				if (ck3Official is null || alreadyEmployedCharacters.Contains(ck3Official.Id)) {
 					continue;
 				}
 
 				// A ruler cannot be their own councillor.
 				if (ck3Official.Id == ck3Ruler.Id) {
 					continue;
 				}
 
 				if (!heldTitlesPerCharacterCache.TryGetValue(ck3Official.Id, out int heldTitlesCount)) {
 					heldTitlesCount = parentCollection.Count(t => t.GetHolderId(irSaveDate) == ck3Official.Id);
 					heldTitlesPerCharacterCache[ck3Official.Id] = heldTitlesCount;
 				}
 
 				if (ck3Position == "councillor_court_chaplain") {
 					if (!CanAppointAsCourtChaplain(religionCollection, ck3Ruler, ck3Official, irSaveDate, heldTitlesCount)) {
 						continue;
 					}
 				} else if (ck3Position == "councillor_steward" || ck3Position == "councillor_chancellor" || ck3Position == "councillor_marshal") {
 					if (!CanAppointAsStewardChancellorMarshal(religionCollection, ck3Ruler, ck3Official, irSaveDate, heldTitlesCount)) {
 						continue;
 					}
 				}
 
 				// We only need to set the employer when the council member is landless.
 				if (heldTitlesCount == 0) {
 					ck3Official.History.AddFieldValue(irSaveDate, "employer", "employer", ck3Ruler.Id);
 				}
 				ck3Official.History.AddFieldValue(irSaveDate, "council_position", "give_council_position", ck3Position);
 
 				// One character should only hold one CK3 position.
 				convertibleJobs.Remove(job);
 				alreadyEmployedCharacters.Add(ck3Official.Id);
 
 				break;
 			}
 		}
 	}
 
 	private static bool CanAppointAsCourtChaplain(ReligionCollection religionCollection, Character ck3Ruler, Character ck3Official, Date irSaveDate, int heldTitlesCount) {
 		// Court chaplains need to have the same faith as the ruler.
 		var rulerFaithId = ck3Ruler.GetFaithId(irSaveDate);