Initialize narratio Go module and CLI scaffold

cmd/narratio/main.go

@@ -0,0 +1,11 @@
+package main
+
+import (
+	"os"
+
+	"gitea.maximumdirect.net/eric/narratio/internal/app"
+)
+
+func main() {
+	os.Exit(app.Execute(os.Args[1:], os.Stdout, os.Stderr))
+}