feat(commands): refactor and add more commands

commands/fs/touch.go

@@ -0,0 +1,13 @@
+package fs
+
+import (
+	"github.com/versenilvis/iris/commands/core"
+)
+
+func init() {
+	core.Register(&core.Spec{
+		Name:        "touch",
+		Description: "create or update file timestamp",
+		Generator:   core.FileGenerator(),
+	})
+}