Changes in version 0.99.5                        

Initial Bioconductor submission

  - Introduced plotOverlay() for displaying a foreground feature over a
    contextual background in a two-dimensional SingleCellExperiment
    embedding. Background and foreground layers have independent colour
    scales and can represent gene expression, cell metadata, or a solid
    colour.
  - Added foreground-only cell selection, preserving the full embedding
    as background context. Supports configurable assays, point sizes,
    transparency, colour limits, legends, and drawing order.
  - Added plotGeneOverlay() for plotting one or more gene-expression
    overlays.
  - Added plotOverlayPerGroup() and plotOverlayPerNestedGroup() for
    comparing subsets across grouped panels, with optional shared
    foreground scales and legends. Nested layouts support automatic
    selection between compact and aligned grids, with informative panel
    titles.
  - Added bivariate foreground colouring for two numeric features, with
    plotBivariateLegend() for the corresponding two-dimensional legend.
  - Added combination colouring for the thresholded positive/negative
    patterns of two to five numeric features.
  - Added palette utilities getPalette(), listPalettes(), and
    plotPalettes() for selecting, inspecting, and previewing
    categorical, continuous, and bivariate colour palettes.
  - Added optional point rasterization for dense embeddings while
    retaining ggplot2-compatible plot output.