chore(highcharts): add metadata for stereonet-equal-area

Author: github-actions[bot]

plots/stereonet-equal-area/metadata/highcharts.yaml

@@ -0,0 +1,19 @@
+# Per-library metadata for highcharts implementation of stereonet-equal-area
+# Auto-generated by impl-generate.yml
+
+library: highcharts
+specification_id: stereonet-equal-area
+created: '2026-03-15T23:05:23Z'
+updated: '2026-03-15T23:05:23Z'
+generated_by: claude-opus-4-5-20251101
+workflow_run: 23121188982
+issue: 4576
+python_version: 3.14.3
+library_version: unknown
+preview_url: https://storage.googleapis.com/pyplots-images/plots/stereonet-equal-area/highcharts/plot.png
+preview_thumb: https://storage.googleapis.com/pyplots-images/plots/stereonet-equal-area/highcharts/plot_thumb.png
+preview_html: https://storage.googleapis.com/pyplots-images/plots/stereonet-equal-area/highcharts/plot.html
+quality_score: null
+review:
+  strengths: []
+  weaknesses: []