Move Windows console hack into constrained file to fix Linux build

cmd/lume/init_windows.go

@@ -0,0 +1,19 @@
+// +build windows
+
+// https://stackoverflow.com/a/52579002
+
+package main
+
+import (
+	"os"
+
+	"golang.org/x/sys/windows"
+)
+
+func init() {
+	stdout := windows.Handle(os.Stdout.Fd())
+	var originalMode uint32
+
+	windows.GetConsoleMode(stdout, &originalMode)
+	windows.SetConsoleMode(stdout, originalMode|windows.ENABLE_VIRTUAL_TERMINAL_PROCESSING)
+}