Add IDs to avoid rewriting during translations

[remibetin]

Current Issue:

By default:

• ReSpec uses heading's text content to generate IDs. See https://respec.org/docs/#custom-heading-ids
• Sections are automatically numbered and uniquely id's. See https://respec.org/docs/#sections
• IDs for glossary entries (dfn elements) are generated based on description term (or data-lt value when existing)

Therefore, when main headings, guidelines headings and definitions terms are translated in another language, IDs also change.

Issues include:

• That does not work properly for non-latin characters. For example, for Simplified Chinese headings, automatically created IDs are generatedID, generatedID-0, etc.
• Translations checks are more difficult when IDs differ from the original version.
• Restoring the English IDs after exporting to HTML is very tedious.

Proposed Solution:

Stable IDs are manually added to main headings, guidelines headings and definition terms, so that they are not overwritten by ReSpec during translation.

In this pull request, I have used the currently generated IDs from the live original version.

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Preview | Diff

[remibetin]

Note: The preview is not working well. It cannot get the SC and terms. Is it because my branch is from a forked repo?