md-mode 0.2.0

Highlights

• Edit Markdown with heading scale, emphasis, code, links, quotes, callouts,
  tasks, and tables styled directly in the source buffer.
• Switch to a complete read-only Rendered view and return to byte-for-byte
  editable Markdown source.
• Create, delete, align, and structurally edit Markdown tables with
  width-aware wrapping in editing and rendered views.
• Browse and navigate document structure through the live side-window TOC,
  Imenu, folding, and Org-style heading commands.
• Fold front matter and fenced code blocks, optionally at startup.
• Customize the six heading scales together or override each level through
  its native Emacs face.
• Keep mixed Chinese/Latin heading typography aligned when fallback fonts
  inherit face sizes.
• Render local LaTeX math as SVG, Mermaid as PNG, and PlantUML or Graphviz as
  SVG. All media rendering is asynchronous, cached, source-preserving, and
  visible when the first Rendered view completes.
• Reuse compatible markdown-mode faces without loading or depending on
  markdown-mode; heading scale remains controlled by md-mode.

Requirements

• Emacs 29.1 or newer.
• Optional math previews: latex and dvisvgm.
• Optional Mermaid previews: mmdc and local Chrome or Chromium.
• Optional PlantUML previews: plantuml.
• Optional Graphviz previews: dot.

This release consolidates all improvements after the initial package baseline
into the 0.2 release line, including the accepted parts of community feedback
in issue #1.

Release commit: 26fc975