Md2OneNote 1.0.0-preview.4

Preview build. Not code-signed: Windows SmartScreen will warn when you run it. The SHA256SUMS file lets you check the download.

Still unsigned: Windows SmartScreen will warn when the installer runs.

Added

• Graphviz diagrams (```dot or ```graphviz fences) and formulas (```math fences and
  $$ blocks, set with KaTeX) import as pictures the way Mermaid diagrams do: offline, at 2x,
  with the source kept as code and the reason shown when rendering fails. Inline $…$ stays
  text.

Changed

• The release workflow signs the add-in's assemblies and the installer through SignPath when
  the repository holds SignPath credentials, and publishes unsigned otherwise, saying so in the
  release notes. Releases stay unsigned until SignPath Foundation approves the project.

---

If Md2OneNote saves you time, you can support the project.