feat(glossary): provide basic term glossary (#869)

* feat(glossary): provide basic term glossary

Enabled a site-wide terminology glossary.

* Added the `term` shortcode displaying term definition.
* Added the /glossary page showing all term definitions.
* Enabled a simplistic search of term definitions.

* refactor(glossary): update glossary page links and add callout for Hugo support

- Removed the glossary entry from the menu and adjusted weights for subsequent items.
- Added informational callouts in the glossary documentation for multiple languages, directing users to the Hugo Glossary Quick Reference.
- Updated links in the glossary documentation to point to the correct pages.

* fix(glossary): update links to glossary page format across multiple languages

- Changed links in the glossary documentation to use Hugo's relref format for consistency.
- Updated links in Persian, Japanese, English, and Simplified Chinese glossary pages.

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Co-authored-by: Xin <5097752+imfing@users.noreply.github.com>
Co-authored-by: Xin <xin@imfing.com>

docs/data/en/termbase.yaml

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+---
+# Terminology glossary
+#
+# Example usage of term.html shortcode:
+#
+# {{< term "SEO" >}}
+
+- term: seo
+  abbr: SEO
+  definition: "Search engine optimization – improving the visibility of a web page in search engines"
+- term: static site generator
+  definition: "Software engines processing text input to generate static web pages"

docs/data/fa/termbase.yaml

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+---
+# واژه‌نامه اصطلاحات
+#
+# نمونه‌ای از استفاده از term.html:
+#
+# {{< term "SEO" >}}
+
+- term: seo
+  abbr: SEO
+  definition: "بهینه‌سازی موتور جستجو – افزایش دیده‌شدن یک صفحهٔ وب در نتایج موتورهای جستجو"
+- term: "سازندهٔ سایت ایستا"
+  definition: "موتورهایی که ورودی متنی را پردازش کرده و صفحات وب ایستا تولید می‌کنند"

docs/data/ja/termbase.yaml

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+---
+# 用語集
+#
+# term.html ショートコードの使用例：
+#
+# {{< term "SEO" >}}
+
+- term: seo
+  abbr: SEO
+  definition: "検索エンジン最適化 — ウェブページの検索エンジンでの可視性を向上させる手法"
+- term: "静的サイトジェネレーター"
+  definition: "テキスト入力を処理して静的なウェブページを生成するソフトウェアエンジン"

docs/data/zh-cn/termbase.yaml

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+---
+# 术语词汇表
+#
+# term.html shortcode 的使用示例：
+#
+# {{< term "SEO" >}}
+
+- term: seo
+  abbr: SEO
+  definition: "搜索引擎优化——提高网页在搜索引擎中的可见度"
+- term: "静态网站生成器"
+  definition: "将文本输入处理为静态网页的生成引擎"