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/assets/images/index/arrow_right_blue.svg

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="16px" height="16px" viewBox="0 0 16 16" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+    <title>编组 5</title>
+    <g id="V1.1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
+        <g id="首页" transform="translate(-1226, -244)" stroke="#155EEF">
+            <g id="新手指引" transform="translate(1120, 80)">
+                <g id="编组-6" transform="translate(16, 156)">
+                    <g id="编组-5" transform="translate(90, 8)">
+                        <polyline id="路径" points="10 6 12 8 10 10"></polyline>
+                        <line x1="12" y1="8" x2="2" y2="8" id="路径-2"></line>
+                    </g>
+                </g>
+            </g>
+        </g>
+    </g>
+</svg>