feat: add DocumentSegment for inline HTML/SVG/Mermaid rendering #117

Job	Run time
Package compatibility / Node 24	25s
Prepare verification matrix	6s
Package compatibility / Node 22	23s
Verify / audit	9s
Verify / lint-changed	21s
Verify / lint	8s
Verify / architecture	11s
Verify / typecheck	37s
Verify / build-webui	7s
Verify / test	29s
Gate	3s
	2m 59s

Provide feedback