feat: add Settlement actor type with Overview/Buildings/Inventory tabs

- New TypeDataModel: archetype, territory, renown, currency (gp/sp/cp),
  garrison, underSiege, isCapital, founded, taxNotes, description, notes
- 3-tab ApplicationV2 sheet with drag & drop for building/weapon/armor/equipment
- Currency steppers (+/−), building constructed toggle, qty controls
- LESS-based CSS (settlement-sheet.less) + base.less updated for shared styles
- Full i18n keys in lang/en.json (8 settlement archetypes)
- system.json: registered settlement actor type

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

module/config/system.mjs

@@ -362,6 +362,17 @@ export const BUILDING_SKILL_CHOICES = {
   masonry:   "OATHHAMMER.BuildingSkill.Masonry"
 }
 
+export const SETTLEMENT_ARCHETYPES = {
+  "center-of-learning":   "OATHHAMMER.SettlementArchetype.CenterOfLearning",
+  "dwarven-borough":      "OATHHAMMER.SettlementArchetype.DwarvenBorough",
+  "free-city":            "OATHHAMMER.SettlementArchetype.FreeCity",
+  "guild-municipality":   "OATHHAMMER.SettlementArchetype.GuildMunicipality",
+  "nocklander-outpost":   "OATHHAMMER.SettlementArchetype.NocklanderOutpost",
+  "pilgrim-mission":      "OATHHAMMER.SettlementArchetype.PilgrimMission",
+  "port-town":            "OATHHAMMER.SettlementArchetype.PortTown",
+  "velathi-colony":       "OATHHAMMER.SettlementArchetype.VelathiColony"
+}
+
 export const SYSTEM = {
   id: SYSTEM_ID,
   ATTRIBUTES,
@@ -389,6 +400,7 @@ export const SYSTEM = {
   TRAIT_TYPE_CHOICES,
   TRAIT_USAGE_PERIOD,
   BUILDING_SKILL_CHOICES,
+  SETTLEMENT_ARCHETYPES,
   STATUS_EFFECTS,
   ATTRIBUTE_RANK_CHOICES,
   ASCII