Basic plotting support

examples/interactive/bar_chart.nbt

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+let names = ["Iron", "Copper", "Silver", "Gold", "Platinum"]
+let elements = map(element, names)
+
+fn density(e: ChemicalElement) -> MassDensity = e.density
+
+let densities = map(density, elements)
+
+bar_chart(densities) |>
+  xlabels(names) |>
+  value_label("Density") |>
+  show

examples/interactive/line_plot.nbt

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+let A0 = 3 cm
+let ω = 20 Hz
+let λ = 1.5 s
+
+fn amplitude(t) = A0 exp(-t/λ) cos(ω t)
+
+line_plot(amplitude, 0 s, 8 s) |>
+  xlabel("Time") |>
+  ylabel("Amplitude") |>
+  show