Implement UI scaling and more (#501)

**New Features**
 * Runtime font accessors and new symbol fonts for text, launcher, statusbar, and shared icons.
 * Added font height base setting to device.properties
 * Text fonts now have 3 sizes: small, default, large

**Improvements**
 * Renamed `UiScale` to `UiDensity`
 * Statusbar, toolbar and many UI components now compute heights and spacing from fonts/density.
 * SSD1306 initialization sequence refined for more stable startup.
 * Multiple image assets replaced by symbol-font rendering.
 * Many layout improvements related to density, font scaling and icon scaling
 * Updated folder name capitalization for newer style

Tactility/Include/Tactility/hal/Configuration.h

@@ -1,6 +1,8 @@
 #pragma once
 
-#include <Tactility/hal/sdcard/SdCardDevice.h>
+#include <memory>
+#include <tactility/hal/Device.h>
+#include <vector>
 
 namespace tt::hal {
 
@@ -11,9 +13,9 @@ typedef std::vector<std::shared_ptr<Device>> DeviceVector;
 typedef std::shared_ptr<Device> (*CreateDevice)();
 
 /** Affects LVGL widget style */
-enum class UiScale {
+enum class UiDensity {
     /** Ideal for very small non-touch screen devices (e.g. Waveshare S3 LCD 1.3") */
-    Smallest,
+    Compact,
     /** Nothing was changed in the LVGL UI/UX */
     Default
 };
@@ -25,7 +27,7 @@ struct Configuration {
     const InitBoot initBoot = nullptr;
 
     /** Modify LVGL widget size */
-    const UiScale uiScale = UiScale::Default;
+    const UiDensity uiDensity = UiDensity::Default;
 
     const std::function<DeviceVector()> createDevices = [] { return DeviceVector(); };
 };

Tactility/Include/Tactility/lvgl/Statusbar.h

@@ -7,8 +7,6 @@
 namespace tt::lvgl {
 
 constexpr auto STATUSBAR_ICON_LIMIT = 8;
-constexpr auto STATUSBAR_ICON_SIZE = 20;
-constexpr auto STATUSBAR_HEIGHT = STATUSBAR_ICON_SIZE + 2;
 
 /** Create a statusbar widget. Needs to be called with LVGL lock. */
 lv_obj_t* statusbar_create(lv_obj_t* parent);
@@ -28,4 +26,6 @@ void statusbar_icon_set_image(int8_t id, const std::string& image);
 /** Update the visibility for an icon on the statusbar. Does not need to be called with LVGL lock. */
 void statusbar_icon_set_visibility(int8_t id, bool visible);
 
+int statusbar_get_height();
+
 } // namespace

Tactility/Include/Tactility/lvgl/Toolbar.h

@@ -1,11 +1,11 @@
 #pragma once
 
 #include "../app/AppContext.h"
-#include "Tactility/Tactility.h"
 
 #include <lvgl.h>
 
 namespace tt::lvgl {
+
 #define TOOLBAR_ACTION_LIMIT 4
 
 /** Create a toolbar widget that shows the app name as title */