Better modularize clipboard code (add "clip" package; break up TOTP code

clip/launchClipClearProcessCLIUNIX.go

@@ -0,0 +1,20 @@
+//go:build !windows && !darwin && !android && !ios && !termux && !wsl && !interactive
+
+package clip
+
+import (
+	"os"
+	"os/exec"
+	"strconv"
+
+	"github.com/rwinkhart/go-boilerplate/back"
+)
+
+// LaunchClipClearProcess launches the timed clipboard clearing process.
+// For non-interactive CLI implementations, an entirely separate process is created for this purpose.
+func LaunchClipClearProcess(copySubject string, isWayland bool) {
+	cmd := exec.Command(os.Args[0], "clipclear", strconv.FormatBool(isWayland))
+	_ = back.WriteToStdin(cmd, copySubject)
+	_ = cmd.Start()
+	os.Exit(0) // use os.Exit directly since this version of this function is only meant for non-interactive CLI implementations
+}