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/applications/defense-dialog.mjs

@@ -68,7 +68,7 @@ export default class OathHammerDefenseDialog {
     )
 
     const result = await foundry.applications.api.DialogV2.wait({
-      window:      { title: game.i18n.format("OATHHAMMER.Dialog.DefenseTitle", { actor: actor.name }) },
+      window:      { title: game.i18n.format("OATHHAMMER.Dialog.DefenseTitle", { actor: actor.name }), resizable: true },
       classes:     ["fvtt-oath-hammer"],
       position:    { width: 420 },
       content,