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.

data/infinitelist.go

@@ -0,0 +1,69 @@
+package data
+
+import (
+	"log/slog"
+
+	"github.com/egoist/mygo/ui"
+
+	"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/feedback"
+	"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
+)
+
+type InfiniteListOptions struct {
+	// Height is in dots; zero means 120.
+	Height int
+	// Done hides the LOADING row: there is no more.
+	Done bool
+}
+
+type InfiniteListResult struct {
+	Element *ui.Element
+	// More asks for rows past the n there are.
+	More bool
+}
+
+type moreKey struct{}
+
+// asking remembers the length last asked past.
+type asking struct {
+	at   int
+	more bool
+	list ui.ListState
+}
+
+// InfiniteList asks for more when its LOADING row shows.
+func InfiniteList(c *ui.Context, text string, n int, o InfiniteListOptions, row func(i int)) InfiniteListResult {
+	k := pixel.K(c)
+	box := ui.Box(c)
+	s := ui.Local(box, moreKey{}, func() asking { return asking{at: -1} })
+	res := InfiniteListResult{Element: box, More: s.more}
+	s.more = false
+	rows := n + 1
+	if o.Done {
+		rows = n
+	}
+	var e *ui.Element
+	box.Children(func() {
+		e = ui.List(c, &s.list, rows, pixel.Lazy(c, func(i int) {
+			if i < n {
+				row(i)
+				return
+			}
+			// Built as it nears the view: ask once per length.
+			if s.at != n {
+				s.at, s.more = n, true
+				c.Invalidate()
+			}
+			ui.Row(c).Gap(k.D(4)).Padding(k.D(2), k.D(6)).AlignItems(ui.Center).Children(func() {
+				feedback.DotsLoader(c, k.Msg("loading"), feedback.DotsLoaderOptions{})
+				pixel.Text(c, k.Msg("loading"), pixel.TextOptions{Slot: pixel.Faint})
+			})
+		})).Padding(0, k.D(3)).Height(k.D(pixel.Or("InfiniteList Height", o.Height, 120))).Label(text)
+		veil(c, pixel.Current(c).Inert)
+	})
+	well(c, box, pixel.State{Focus: e.FocusRing(false).FocusVisible()})
+	if res.More {
+		slog.Debug("8bit: list wants more", "label", text, "rows", n)
+	}
+	return res
+}