feat(tracker): create initial tracker skeleton using Gio

go4k/cmd/sointu-tracker/main.go

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"fmt"
+	"gioui.org/app"
+	"gioui.org/unit"
+	"github.com/vsariola/sointu/go4k/tracker"
+	"os"
+)
+
+func main() {
+	go func() {
+		w := app.NewWindow(
+			app.Size(unit.Dp(800), unit.Dp(600)),
+			app.Title("Sointu Tracker"),
+		)
+		if err := tracker.New().Run(w); err != nil {
+			fmt.Println(err)
+			os.Exit(1)
+		}
+		os.Exit(0)
+	}()
+	app.Main()
+}