engine: geometry.check reports what is small against the element size

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UhhZMBTviDQxZvwnyP89fo

assets/icons/src/geometry.check.json

@@ -0,0 +1 @@
+{"shapes": [{"d": "M9 3 L16 6.5 L16 13 L9 16.5 L2 13 L2 6.5 Z", "fill": "soft", "stroke": "line"}, {"d": "M2 6.5 L9 10 L16 6.5 M9 10 L9 16.5", "stroke": "line"}, {"line": [2, 6.5, 2, 9.5], "stroke": "warm", "width": 2.25}, {"circle": [17, 17, 3.5], "stroke": "accent", "width": 1.75}, {"line": [19.5, 19.5, 22, 22], "stroke": "accent", "width": 2}]}