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/log_test.go

@@ -0,0 +1,50 @@
+package data_test
+
+import (
+	"bytes"
+	"log/slog"
+	"strings"
+	"testing"
+
+	"github.com/egoist/mygo/ui"
+
+	"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/data"
+	"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/icon"
+)
+
+// logs captures debug logs while fn runs.
+func logs(fn func()) string {
+	var buf bytes.Buffer
+	old := slog.Default()
+	slog.SetDefault(slog.New(slog.NewTextHandler(&buf, &slog.HandlerOptions{Level: slog.LevelDebug})))
+	defer slog.SetDefault(old)
+	fn()
+	return buf.String()
+}
+
+func TestStateChangesAreLogged(t *testing.T) {
+	sort, row, slot, file := data.Sort{}, 0, 0, "/"
+	items := []data.Item{{Sprite: icon.Potion, Name: "Potion"}, {Sprite: icon.Gem, Name: "Gem"}}
+	kids := map[string][]string{"/": {"/a"}}
+	tt := view(700, 300, newClock(), false, func(c *ui.Context) {
+		ui.Row(c).Children(func() {
+			data.Table(c, "Roster", []data.Column{{Title: "Name"}}, len(heroes), &sort, &row, data.TableOptions{}, func(r, _ int) string { return heroes[r] })
+			data.Inventory(c, "Bag", items, &slot, data.InventoryOptions{})
+			data.Outline(c, "Files", []string{"/"}, func(k string) []string { return kids[k] }, func(k string) string { return k }, &file, data.OutlineOptions{})
+		})
+	})
+	out := logs(func() {
+		click(t, tt, "Brom")
+		tt.Key(0, ui.KeyDown)
+		r := find(t, tt, "Bag")
+		tt.ClickAt(r.X+4, r.Y+4)
+		tt.Key(0, ui.KeyRight)
+		click(t, tt, "/")
+		tt.Key(0, ui.KeyRight)
+	})
+	for _, want := range []string{"8bit: table chose", "8bit: inventory chose", "8bit: outline toggled"} {
+		if !strings.Contains(out, want) {
+			t.Errorf("no %q in the logs:\n%s", want, out)
+		}
+	}
+}