go(commands): add commands to list git branch

go/commands/git.go

@@ -0,0 +1,18 @@
+package commands
+
+import (
+	"ocl/portainer-devtool/utils"
+	"os/exec"
+)
+
+func ListBranches(workdir string) error {
+	cmd := exec.Command("git", "branch")
+	cmd.Dir = workdir
+	out, err := cmd.Output()
+	if err != nil {
+		return err
+	}
+
+	utils.PrintOutput("Your current checkout branch", out)
+	return nil
+}