fix(render-biblio): sanitize spaces in reference IDs

[marcoscaceres]

Reference names with spaces (e.g. 'Ruby TTS Req') produced invalid HTML IDs containing spaces. Consolidates all bib- ID generation through a bibRefId() helper that replaces whitespace with hyphens.

Closes #5102

[Copilot]

Pull request overview

Fixes invalid HTML id generation for bibliography entries when reference keys contain whitespace by centralizing bib fragment/id creation in a helper that replaces whitespace with hyphens.

Changes:

• Add bibRefId(ref) helper to generate bib-... IDs with whitespace normalized to -.
• Update inline citation rendering to link to #${bibRefId(key)}.
• Update reference list rendering and alias/warn selectors to use the same normalized bib IDs.

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[marcoscaceres]

Hmmm... definitely need a test for this one.

The examples are wild:

	  'Tokyo Ghoul: re': {
              title: "Tokyo Ghoul: re, Vol. 8, Chapter 76 “Daso (惰疎)",
              authors: ["Sui Ishida"], 
              id: "Tokyo Groul: re 8-76",
              date: "2016",
              publisher: "Shueisha",
          },
          'Transliteration Training Course': {
              title: "Textbook for the Volunteer Transliteration Training Course: Basics (In Japanese, 音訳ボランティア養成講習会テキスト　基礎課程編)",
	      href: "https://naiiv-books.net/shopdetail/000000000023/",
            date: "March 2010",
            publisher: "National Council of Japan for the Visually Impaired (In Japanese, 全国視覚障害者情報提供施設協会)",
          },

As I never expected ids from bib-ref to be used this way (they follow the short name rules from w3c)... but sure, why not!