Add overlay components 176-195; pixel Harbor and Kit.Cue

Dialogs on DialogBase with focusable panels that harbor parked focus,
popovers on PopoverBase, bubbles, drawers, sheets, a lightbox, an RPG
dialogue box, notifications, a pause menu and a dithered title card.
Kit.Cue moves from feedback to pixel.

overlay/pausemenu.go

@@ -0,0 +1,65 @@
+package overlay
+
+import (
+	"log/slog"
+
+	"github.com/egoist/mygo/ui"
+
+	"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
+)
+
+type PauseMenuOptions struct {
+	Disabled bool
+}
+
+type PauseMenuResult struct {
+	Element *ui.Element
+	// Chosen is RESUME 0, OPTIONS 1, QUIT 2, or -1.
+	Chosen int
+}
+
+type pauseKey struct{}
+
+// PauseMenu veils the game under PAUSED; Escape resumes.
+func PauseMenu(c *ui.Context, paused *bool, o PauseMenuOptions) PauseMenuResult {
+	k := pixel.K(c)
+	home := ui.Box(c)
+	cur := ui.Local(home, pauseKey{}, func() int { return 0 })
+	was := *paused
+	res := PauseMenuResult{Chosen: -1}
+	items := []string{k.Msg("resume"), k.Msg("options"), k.Msg("quit")}
+	res.Element = ui.DialogBase(c, paused, func(back, panel *ui.Element) {
+		deep, light := dark(k)
+		dim(k, back, deep, 10)
+		title := k.Msg("paused")
+		panel.Label(title).Focusable().FocusRing(false).AlignItems(ui.Center).Gap(k.D(10)).Children(func() {
+			pixel.Harbor(c, panel, func() {
+				ui.Box(c).Size(k.D(pixel.Measure(title)*3), k.D(pixel.LineHeight*3)).Role(ui.RoleText).Label(title).Draw(func(p *ui.Painter, r ui.Rect) {
+					g := k.Canvas(p, r)
+					if g.Step(2)%2 == 0 || k.Reduce() {
+						g.Text(0, 0, title, light, 3)
+					}
+				})
+				ui.Box(c).Padding(k.D(6), k.D(10)).Draw(func(p *ui.Painter, r ui.Rect) {
+					g := k.Canvas(p, r)
+					g.Frame(0, 0, g.W, g.H, pixel.Window, pixel.Face)
+				}).Children(func() {
+					if i := choose(c, title, items, cur, false, o.Disabled); i >= 0 {
+						res.Chosen = i
+						*paused = i != 0
+					}
+				})
+			})
+		})
+	})
+	if was && !*paused && res.Chosen < 0 {
+		res.Chosen = 0
+	}
+	if !*paused {
+		*cur = 0
+	}
+	if res.Chosen >= 0 {
+		slog.Debug("8bit: pause menu", "chosen", items[res.Chosen])
+	}
+	return res
+}