all: rename the gioui.org/ui module to gioui.org

The "ui" is redundant and stutters.

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

system/system.go

@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: Unlicense OR MIT
+
+// Package system contain ops and types for
+// system events.
+package system
+
+import (
+	"gioui.org/ui"
+	"gioui.org/internal/opconst"
+)
+
+// ProfileOp registers a handler for receiving
+// ProfileEvents.
+type ProfileOp struct {
+	Key ui.Key
+}
+
+// ProfileEvent contain profile data from a single
+// rendered frame.
+type ProfileEvent struct {
+	// String with timings. Very likely to change.
+	Timings string
+}
+
+func (p ProfileOp) Add(o *ui.Ops) {
+	data := make([]byte, opconst.TypeProfileLen)
+	data[0] = byte(opconst.TypeProfile)
+	o.Write(data, p.Key)
+}
+
+func (p ProfileEvent) ImplementsEvent() {}