v0.34.0

Added

Highcharts chart-type parity (#296–#326), each with a geom_* shortcut and a
configurable geom_*_with:

• Business / KPI: geom_waterfall (#296), geom_pareto (sorted bars +
  cumulative-% line on a SecAxis::percent_of_max axis, #297),
  geom_funnel / geom_pyramid (#303), geom_bullet (#307),
  geom_lollipop / geom_dumbbell (#306), geom_variwide /
  geom_marimekko (#314).
• Flows & networks: geom_sankey (#298), geom_chord (#299),
  geom_arcdiagram (#300), force-directed geom_network (#310),
  geom_flow origin–destination flow maps (feature sf, #324).
• Hierarchies: squarified geom_treemap (#301), geom_sunburst /
  geom_icicle (#302), geom_packed_bubble (#309), geom_tree / org
  charts / geom_dendrogram (#311).
• Sets & units: geom_waffle / geom_parliament (#308), area-
  proportional geom_venn (#312), geom_wordcloud (#313),
  geom_variable_pie (#319).
• Time: streamgraphs via StackOffset (silhouette, wiggle) +
  geom_stream (#304); spline Interpolate (monotone cubic, Catmull-Rom)
  on line / area / ribbon (#305); geom_timeline (#315); geom_xrange
  Gantt charts (#316); geom_flags event flags (#323).
• Finance: hollow candles, geom_hlc, geom_heikin_ashi (#320);
  geom_renko / geom_point_figure (#321); StatIndicator — SMA, EMA,
  WMA, Bollinger, MACD, RSI, ATR, VWAP, stochastic, ZigZag (#322).
• Maps & weather: geom_tilemap tile-grid cartograms (+
  us_state_grid, #317), geom_windbarb (#318).
• Tiled basemaps (new feature tiles, #325):
  annotation_map_tile(TileSource::xyz(..), fetcher) draws XYZ raster tiles
  (OpenStreetMap and friends) under Web-Mercator geom_sf layers, with the
  source's attribution. No networking in the crate: tiles come from a
  caller-supplied TileFetcher (any Fn(z, x, y) -> Option<Vec<u8>>) and
  are cached per layer. New DrawBackend::draw_image (default: no-op),
  implemented by the native SVG, canvas and plotters backends.
• GGPlot::legend_inside_auto() / legend_inside_auto_with(corners, fallback) (#332): the legend goes inside the panel in the first corner
  where its real box overlaps no drawn mark, else outside on the side
  (Top/Right) that leaves the data area larger. The choice is the root
  data-legend-at attribute.
• GGPlot::facet_levels(&[..]) (#329): explicit facet_wrap panel
  order; levels without data keep an empty panel (ggplot2's drop = FALSE).
• PlotGrid::legend_bottom_when_narrow(share) (#363): a grid's
  collected legend column moves below the grid on narrow renders.
• Examples: inventory_twin (quantile fan + PlotGrid alarm strip, #124)
  and map_tiles; README gallery and chart-family overview (#326).

Fixed

• ScaleDateTime::with_date_labels is honoured on automatic month and year
  breaks (#352).
• position_jitter / geom_jitter / position_jitterdodge now jitter on a
  discrete x axis (points used to stay on the category's centre line).
• A Bottom legend under an axis-less theme (theme_void) stays on the
  canvas instead of being placed at its edge with zero height (#341).
• The caption is drawn inside its reserved area, below a Bottom legend
  (#286).
• The y axis title keeps a gap to short tick labels; a faceted grid draws
  one x and one y axis title instead of one per panel (#348).
• Chart-type shortcuts (geom_waterfall, geom_funnel, geom_waffle, …)
  honour theme ink/paper and primary_color (#362).

Changed

• Breaking for struct literals without ..Default::default(): new
  fields interpolate on GeomLine / GeomArea / GeomRibbon, style /
  open_tick on the candlestick geoms, offset on PositionStack,
  percent_of_max on SecAxis, and levels on Facet::Wrap.