feat(index): add homepage with dashboard cards and knowledge graph support

- Add new Index view with dashboard layout and quick action cards
- Create TopCardList component to display core data management options
- Add GuideCard and VersionCard components for user guidance
- Add QuickActions component for common operations
- Create KnowledgeGraph and KnowledgeGraphCard components for knowledge base visualization
- Add comprehensive SVG assets for index page (apps, arrows, management icons)
- Add common API module for shared request utilities
- Extend knowledgeBase API with knowledge graph endpoints (getKnowledgeGraph, getKnowledgeGraphEntityTypes)
- Update i18n translations for English and Chinese with new index page strings
- Update routing configuration to include new Index route
- Update menu configuration to reflect new navigation structure
- Update KnowledgeBase CreateModal and Private view components
- Add TypeScript types for Index page components
- Improve overall UI/UX with new dashboard-style homepage

web/src/store/menu.json

@@ -1,5 +1,18 @@
 {
   "manage": [
+    {
+      "id": 999,
+      "parent": 0,
+      "code": "dashboard",
+      "label": "首页",
+      "i18nKey": "menu.home",
+      "path": "/index",
+      "enable": true,
+      "display": true,
+      "level": 1,
+      "sort": 0,
+      "subs": []
+    },
     {
       "id": 1,
       "parent": 0,