docs: update hrp cmd docs

cmd/cli/doc_test.go

@@ -0,0 +1,16 @@
+package main
+
+import (
+	"testing"
+
+	"github.com/httprunner/httprunner/v5/cmd"
+	"github.com/spf13/cobra/doc"
+	"github.com/stretchr/testify/assert"
+)
+
+// run this test to generate markdown docs for hrp command
+func TestGenMarkdownTree(t *testing.T) {
+	addAllCommands()
+	err := doc.GenMarkdownTree(cmd.RootCmd, "../../docs/cmd")
+	assert.Nil(t, err)
+}