Create a faceted overview plot for all columns in a Tablecloth dataset.

For each non-target column: - Categorical columns (meta :categorical? true) -> percentage bar charts. If :target is provided, bars are grouped/colored by target and percentages are computed per category; otherwise a single-color bar chart with value labels, plus subtitle showing NA count and number of unique values. - Continuous columns -> density plots. If :target is provided, densities are colored by target; otherwise a rug and a vertical rule at the mean are added, plus a subtitle with NA/min/max.

Options (merged with defaults): - :target keyword or nil (default nil) — column name used for grouping/coloring. - :color string/color when no target is given (default “skyblue”). - :height int canvas height (default 1000). - :width int canvas width (default 800).

Returns a plotje pose with the individual plots arranged in a 2-column grid.