feat(display): add render method for menu items

include/display.hpp

@@ -1,6 +1,7 @@
 #pragma once
 #include <Arduino.h>
 #include <LiquidCrystal_I2C.h>
+#include "menu.hpp"
 
 /*
  * A helper class to facilitate drawing on a HD44780 LCD display.
@@ -11,6 +12,7 @@ class Display {
 
     void begin();
     void clear();
+    void drawMenu(Menu& menu);
 
     LiquidCrystal_I2C& getLCD();
   private:

src/display.cpp

@@ -12,6 +12,21 @@ void Display::clear() {
   lcd.clear();
 }
 
+void Display::drawMenu(Menu &menu) {
+  clear();
+  size_t currentItemIndex = menu.getCurrentItemIndex();
+  for (size_t i = 0; i < MENU_ITEM_COUNT; i++) {
+    lcd.setCursor(0, i);
+    Item& item = menu.getItemAt(i);
+
+    if (i == currentItemIndex) {
+      lcd.print("> " + item.name);
+    } else {
+      lcd.print("  " + item.name);
+    }
+  }
+}
+
 LiquidCrystal_I2C& Display::getLCD() {
   return lcd;
 }