Add matrix attribute labels #104
                
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Summary
Testing
pre-commit run --files js/matrix/attr_label_data.js js/deck-gl/matrix/attr_label_layers.js js/matrix/set_constants.js js/deck-gl/matrix/matrix_layers.js js/viz/matrix_viz.js docs/javascript/api.mdnpm test(fails: jest not found)pytest --maxfail=1(fails: pytest-cov missing)https://chatgpt.com/codex/tasks/task_b_685d556c6e9c832a9fececdfac4e0354