Add data components 151-175; clear MyGo row highlights

Lists, tables, trees, grids, inventories and records in data/.
Outline and GridView build on ui.List: ui.Outline strokes its arrows
and ui.GridView spaces and tints items. The pixel theme keeps MyGo's
row highlights clear so scrolled rows stay on whole dots; off lists
take a veil against the wheel. Adds Canvas.Silhouette, SwitchOptions
Label and exports Rarity.Slot.

pixel/element_test.go

@@ -19,6 +19,14 @@ func TestSpriteLettersMatchSlots(t *testing.T) {
 	}
 }
 
+func TestSilhouetteKeepsShapeInOneSlot(t *testing.T) {
+	sp := pixel.MustSprite("#a.g")
+	d := canvas(t, 8, 2, func(g pixel.Canvas) { g.Silhouette(0, 0, sp, 0, pixel.Shade, 2) })
+	if d.count(0, 0, 4, 2, pixel.Shade) != 8 || d.count(4, 0, 2, 2, pixel.Back) != 4 || d.count(6, 0, 2, 2, pixel.Shade) != 4 {
+		t.Fatal("Silhouette must fill the shape, scaled, in one slot")
+	}
+}
+
 func TestSpriteFramesMirrorScale(t *testing.T) {
 	sp := pixel.MustSprite(`
 		#a.