feat(highlighter): add jp version

[Hristo313]

Closes #

Checklist:

• check topic's TOC/menu and paragraph headings
• Include TOC topic labels in the topic content when it has a valuable update, is new, or is considered preview / beta
• link to other topics using ../relative/path.md
• at the References section at the end of the topic add links to topics, samples, etc
• reference API documentation instead of adding a section with API

• use valid component names - [Data] Grid, IgxSelectComponent, <igx-combo>
• use spell checker tool (VS Code, Grammarly, Microsoft Editor)
• add inline code blocks for the names of classes / tags / properties
• add language descriptor for the code blocks
• check if links function by running the check-api/mdx npm commands
• check if sample is working and fully visible in the topic
• check if sample is working and fully visible in the StackBlitz
• check if code blocks match the code in StackBlitz demo

• follow SEO guidelines to fill topic's metadata (SEO guidelines)

• do not resolve requested changes (leave that to the reviewer)

[Copilot]

Pull request overview

日本語ドキュメントに {Platform} Highlight コンポーネントの解説ページを追加し、検索文字列のハイライト、ケースセンシティブ検索、入力連携、ナビゲーション、ステータス表示、スタイル設定までをカバーする内容です。

Changes:

• jp/components/inputs/highlight.mdx を新規追加（Highlight の使い方・サンプル・API 参照を日本語で提供）
• Web Components / React / Blazor それぞれの導入手順とコード例を掲載
• 一致移動（next/previous）やヘルパーテキスト表示など追加機能の説明を追加

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