mathjslab-markdown 0.8.0

• Support explicit {#label} anchors and {@ref label} references for
  Markdown headings. Reuse manual decimal numbering in localized section
  references; unnumbered headings use their title. No automatic section
  numbering is added.
• Explicit heading anchors take precedence over automatic slugs. When
  cross-references is enabled, previously literal trailing heading labels
  become metadata and replace the old text-derived anchors. Existing block
  numbering and generated block IDs remain unchanged.
• Preserve extension token walkers in strict security mode so explicit heading
  metadata is processed consistently without disabling HTML escaping.
• Add heading, anchor-conflict and navigation tests, distribution coverage with
  real MathJax, and integrated examples in Portuguese, English and Spanish.
  Validate 616 unit tests across 42 suites and 21 production distribution tests.