chore(muix): add metadata for dumbbell-basic

Author: github-actions[bot]

plots/dumbbell-basic/metadata/javascript/muix.yaml

@@ -0,0 +1,21 @@
+# Per-library metadata for muix implementation of dumbbell-basic
+# Auto-generated by impl-generate.yml
+
+library: muix
+language: javascript
+specification_id: dumbbell-basic
+created: '2026-06-30T23:13:34Z'
+updated: '2026-06-30T23:13:34Z'
+generated_by: claude-sonnet
+workflow_run: 28481532541
+issue: 945
+language_version: 22.23.0
+library_version: 7.29.1
+preview_url_light: https://storage.googleapis.com/anyplot-images/plots/dumbbell-basic/javascript/muix/plot-light.png
+preview_url_dark: https://storage.googleapis.com/anyplot-images/plots/dumbbell-basic/javascript/muix/plot-dark.png
+preview_html_light: https://storage.googleapis.com/anyplot-images/plots/dumbbell-basic/javascript/muix/plot-light.html
+preview_html_dark: https://storage.googleapis.com/anyplot-images/plots/dumbbell-basic/javascript/muix/plot-dark.html
+quality_score: null
+review:
+  strengths: []
+  weaknesses: []