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/note_mgt.svg

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="40px" height="40px" viewBox="0 0 40 40" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+    <title>编组 20</title>
+    <g id="V1.1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
+        <g id="首页" transform="translate(-1152, -772)">
+            <g id="快捷操作" transform="translate(1120, 502)">
+                <g id="编组-11" transform="translate(2, 38)">
+                    <g id="编组-20" transform="translate(30, 232)">
+                        <rect id="矩形" stroke="#DFE4ED" fill="#FFFFFF" x="0.5" y="0.5" width="39" height="39" rx="8"></rect>
+                        <g id="消息提醒" transform="translate(12, 11)" stroke="#212332" stroke-width="1.7">
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+                            <line x1="1.08244944e-14" y1="14.5" x2="16" y2="14.5" id="路径-14" stroke-linecap="round" stroke-linejoin="round"></line>
+                            <line x1="8" y1="-5.46307465e-14" x2="8" y2="1.43460647" id="路径-15" stroke-linecap="round" stroke-linejoin="round"></line>
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+                        </g>
+                    </g>
+                </g>
+            </g>
+        </g>
+    </g>
+</svg>