Settings Screen and first 2 settings (#18)

* white sleep screen

* quicker pwr button

* no extra spacing between paragraphs

* Added settings class with de/serialization and whiteSleepScreen setting to control inverting the sleep screen

* Added Settings screen for real, made settings a global singleton

* Added setting for extra paragraph spacing.

* fixed typo

* Rework after feedback

* Fixed type from bool to uint8

src/screens/SettingsScreen.h

@@ -0,0 +1,43 @@
+#pragma once
+#include <cstdint>
+#include <freertos/FreeRTOS.h>
+#include <freertos/semphr.h>
+#include <freertos/task.h>
+
+#include <string>
+#include <vector>
+
+#include "Screen.h"
+
+class CrossPointSettings;
+
+// Structure to hold setting information
+struct SettingInfo {
+  const char* name;       // Display name of the setting
+  uint8_t CrossPointSettings::* valuePtr;  // Pointer to member in CrossPointSettings
+};
+
+class SettingsScreen final : public Screen {
+  TaskHandle_t displayTaskHandle = nullptr;
+  SemaphoreHandle_t renderingMutex = nullptr;
+  bool updateRequired = false;
+  int selectedSettingIndex = 0;  // Currently selected setting
+  const std::function<void()> onGoHome;
+
+  // Static settings list
+  static constexpr int settingsCount = 2;  // Number of settings
+  static const SettingInfo settingsList[settingsCount];
+
+  static void taskTrampoline(void* param);
+  [[noreturn]] void displayTaskLoop();
+  void render() const;
+  void toggleCurrentSetting();
+
+ public:
+  explicit SettingsScreen(GfxRenderer& renderer, InputManager& inputManager,
+                           const std::function<void()>& onGoHome)
+      : Screen(renderer, inputManager), onGoHome(onGoHome) {}
+  void onEnter() override;
+  void onExit() override;
+  void handleInput() override;
+};