feat: implement auto-polling in cli

cmd/cli/main.go

@@ -28,13 +28,23 @@ type model struct {
 	height   int
 }
 
+type tickMsg time.Time
+
+func tick() tea.Cmd {
+	return tea.Tick(5*time.Second, func(t time.Time) tea.Msg {
+		return tickMsg(t)
+	})
+}
+
 func (m model) Init() tea.Cmd {
-	return fetchServices
+	return tea.Batch(fetchServices, tick())
 }
 
 func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 	var cmd tea.Cmd
 	switch msg := msg.(type) {
+	case tickMsg:
+		return m, tea.Batch(fetchServices, tick())
 	case tea.KeyMsg:
 		switch msg.String() {
 		case "esc", "q", "ctrl+c":