v0.4.0

What's new

3 new diagram types (13 total):

• Timeline: vertical event lists with sections and details
• Kanban: column-based task boards with cards
• Quadrant chart: 2x2 priority/risk matrices with plotted points

5 solid-background themes: gruvbox, monokai, dracula, nord, solarized with filled region colors, depth shading for kanban cards, and per-section coloring across kanban/timeline/quadrant

JSON ingest (--json): pipe structured data directly

echo '{"Python":45,"Go":30}' | termaid --json pie
du -d1 -k /var | termaid --json treemap

CLI: --demo, --themes, quoted edge labels fix, padding_x/gap threaded through 7 renderers