docs: add anchor component documentation

[SonyLeo]

• 添加 anchor 组件使用说明
• 补充 Bubble 组件 BubbleBoxRendererMatch 的参数变更说明

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Repository UI

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Run ID: 87a2127c-9ceb-4327-9423-a194b403bb3a

📥 Commits

Reviewing files that changed from the base of the PR and between a2107c7 and 93f1780.

📒 Files selected for processing (8)

• docs/.vitepress/themeConfig.ts
• docs/demos/anchor/basic-source.messages.ts
• docs/demos/anchor/basic-source.vue
• docs/demos/anchor/controlled-search.messages.ts
• docs/demos/anchor/controlled-search.vue
• docs/demos/anchor/demo-shell.less
• docs/src/components/anchor.md
• docs/src/components/bubble.md

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