feat: add Czech translations, along with some missing ones

[jakubklimek]

• Add Czech translations
• in src/core/structure.js, add support for i10n
• in src/core/dfn-index.js add also other missing translations

Related PR in W3C's fixup.js: w3c/tr-design#376

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[marcoscaceres]

Thanks for doing this @jakubklimek. Checked translations with co-pilot. It liked them too.

[Copilot]

Pull Request Overview

This PR adds comprehensive Czech language translations to the ReSpec framework, expanding internationalization support. The changes also include adding missing translations for other languages in the definition index module and internationalizing the "Back to Top" functionality.

• Add complete Czech (cs) translations across all localization modules
• Internationalize the "Back to Top" feature in the structure module
• Add missing translations for multiple languages in the definition index

Reviewed Changes

Copilot reviewed 28 out of 29 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
src/w3c/templates/sotd.js	Adds Czech translations for status section
src/w3c/templates/headers.js	Adds Czech translations for document headers
src/w3c/linter-rules/required-sections.js	Adds Czech translations for required sections linter
src/w3c/abstract.js	Adds Czech translation for abstract heading
src/ui/search-xref.js	Adds Czech translation for cross-reference search
src/ui/search-specref.js	Adds Czech translation for Specref search
src/ui/about-respec.js	Adds Czech translation for about dialog
src/core/title.js	Adds Czech translation for default title
src/core/structure.js	Internationalizes "Back to Top" and adds Czech translations
src/core/render-biblio.js	Adds Czech translations for bibliography sections
src/core/mdn-annotation.js	Adds Czech translations for MDN annotations
src/core/linter-rules/*.js	Adds Czech translations for various linter rules
src/core/link-to-dfn.js	Adds Czech translations for duplicate definition messages
src/core/issues-notes.js	Adds Czech translations for issue and note labels
src/core/informative.js	Adds Czech translation for informative section notice
src/core/examples.js	Adds Czech translation for example label
src/core/dfn-index.js	Adds Czech and missing translations for definition index

[marcoscaceres]

Some small linting issues by the looks of it. @jakubklimek, can you run prettier.js over the files affected files?

[marcoscaceres]

Oh yay! copilot found a typo.. mind fixing that too?

[sidvishnoi]

@jakubklimek can you revert all changes to builds/ folder? That folder is updated on release only.

[sidvishnoi]

Thank you, @jakubklimek!