feat(plotly): add @openuidev/plotly package

[vishxrad]

Plotly.js component library for OpenUI's generative UI runtime. Provides 47 LLM-addressable chart components plus a high-level wrapper for one-line chat shells.

Coverage:

• Layout (7): Stack, Card, CardHeader, Heading, Text, Callout, KPI
• Cartesian (5): Bar, Line, Scatter, Area, Histogram
• Distributions (2): Violin, Box
• Matrix & 2D-density (4): Heatmap, Histogram2D, Histogram2DContour, Contour
• Hierarchical (3): Sunburst, Treemap, Icicle
• Categorical (5): Pie, Donut, Funnel, FunnelArea, Waterfall
• Flow (1): Sankey
• Multivariate (3): ScatterMatrix, ParCoords, ParCats
• Financial (2): Candlestick, OHLC
• Polar (2): ScatterPolar, BarPolar
• Specialty coords (2): ScatterTernary, ScatterSmith
• Geo (2): Choropleth, ScatterGeo
• Data display (2): Indicator, Table
• Escape hatches (2): Figure, PlotlyJSON

Architecture:

• Tier-1 typed components map to Plotly traces with Plotly-Express-style prop shapes (Bar(rows, "x", "y", "color")).
• Tier-2 Figure(data, layout) accepts full Plotly Graph-Objects JSON for any chart Tier-1 doesn't cover.
• Tier-0 PlotlyJSON({ figure }) renders a fully-formed figure JSON verbatim — bridges backend-produced figures (Python fig.to_json()).

Bundle:

• plotly.js-dist-min loaded lazily via React.lazy on first chart render (~3.5 MB minified, ~1 MB gzipped). Chat shell first paint is unaffected.
• Compiled package itself: 96 KB ESM / 22 KB gzipped.

Bidirectional reactivity:

• plotly_click / plotly_selected / plotly_relayout events flow into useTriggerAction() so the LLM can wire interactive cross-filters.