start work on go rewrite for stable release

internal/tuimode/tuimode.go

@@ -0,0 +1,28 @@
+package tuimode
+
+import (
+	"code.rocketnine.space/tslocum/cview"
+)
+
+func App() {
+	// Create a TUI app
+	app := cview.NewApplication()
+	defer app.HandlePanic()
+	app.EnableMouse(true)
+
+	// Generate flex grid
+	flex := cview.NewFlex()
+	flex.SetDirection(cview.FlexRow)
+
+	tv := cview.NewTextView()
+	tv.SetBorder(true)
+	tv.SetTitle("Hello, world!")
+	tv.SetText("Lorem ipsum dolor sit amet")
+	flex.AddItem(tv, 0, 0, true)
+	flex.AddItem(tv, 0, 1, false)
+
+	app.SetRoot(flex, true)
+	if err := app.Run(); err != nil {
+		panic(err)
+	}
+}