example: rename apps module

The new name emphasize the nature of the programs and won't be
confused with package `app`.

Signed-off-by: Elias Naur <mail@eliasnaur.com>

example/gophers/main_test.go

@@ -0,0 +1,42 @@
+// SPDX-License-Identifier: Unlicense OR MIT
+
+package main
+
+import (
+	"image"
+	"testing"
+	"time"
+
+	"gioui.org/io/event"
+	"gioui.org/layout"
+	"gioui.org/unit"
+)
+
+type queue struct{}
+
+type config struct{}
+
+func BenchmarkUI(b *testing.B) {
+	fetch := func(_ string) {}
+	u := newUI(fetch)
+	cfg := new(config)
+	gtx := &layout.Context{
+		Queue: new(queue),
+	}
+	for i := 0; i < b.N; i++ {
+		gtx.Reset(cfg, image.Point{800, 600})
+		u.Layout(gtx)
+	}
+}
+
+func (queue) Events(k event.Key) []event.Event {
+	return nil
+}
+
+func (config) Now() time.Time {
+	return time.Now()
+}
+
+func (config) Px(v unit.Value) int {
+	return int(v.V + .5)
+}