Add optional toggle for Relationship Status Fields (v2.1.2)

- Added relationships.enabled toggle in tracker configuration
- Relationship fields and emoji badges can now be disabled/enabled
- UI toggle added in Edit Trackers > Present Characters tab
- Updated prompt generation to respect the toggle
- Maintains backward compatibility with existing configs
- Added i18n translations (en, zh-tw)

src/i18n/zh-tw.json

@@ -112,6 +112,7 @@
     "template.trackerEditorModal.infoBoxTab.locationWidget": "位置",
     "template.trackerEditorModal.infoBoxTab.recentEventsWidget": "近期事件",
     "template.trackerEditorModal.presentCharactersTab.relationshipStatusTitle": "關係狀態",
+    "template.trackerEditorModal.presentCharactersTab.enableRelationshipStatus": "啟用關係狀態欄位",
     "template.trackerEditorModal.presentCharactersTab.relationshipStatusHint": "定義關係類型，並在角色頭像上顯示對應的表情符號",
     "template.trackerEditorModal.presentCharactersTab.newRelationshipButton": "新增關係類型",
     "template.trackerEditorModal.presentCharactersTab.appearanceDemeanorTitle": "外觀與當前行為舉止",