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

TactilityC/Include/tt_hal.h

@@ -7,14 +7,26 @@ extern "C" {
 /** Affects LVGL widget style */
 typedef enum {
     /** Ideal for very small non-touch screen devices (e.g. Waveshare S3 LCD 1.3") */
-    UiScaleSmallest,
+    UiDensityCompact,
     /** Nothing was changed in the LVGL UI/UX */
-    UiScaleDefault
+    UiDensityDefault
+} UiDensity;
+
+/** @deprecated use UiDensity */
+typedef enum {
+    UiScaleSmallest, // UiDensityCompact
+    UiScaleDefault // UiDensityDefault
 } UiScale;
 
-/** @return the UI scaling setting for this device. */
+/**
+ * @deprecated Use UiDensity
+ * @return the UI scaling setting for this device.
+ */
 UiScale tt_hal_configuration_get_ui_scale();
 
+/** @return the UI scaling setting for this device. */
+UiDensity tt_hal_configuration_get_ui_density();
+
 #ifdef __cplusplus
 }
 #endif

TactilityC/Source/symbols/gcc_soft_float_p4.cpp

@@ -32,6 +32,8 @@ extern double __negdf2(double a);
 // extern long double __negtf2(long double a);
 // extern long double __negxf2(long double a);
 
+extern double __extendsfdf2(float a);
+
 // extern long double __extendsftf2(float a);
 // extern long double __extendsfxf2(float a);
 // extern long double __extenddftf2(double a);
@@ -152,6 +154,8 @@ const esp_elfsym gcc_soft_float_symbols[] = {
     // ESP_ELFSYM_EXPORT(__negtf2),
     // ESP_ELFSYM_EXPORT(__negxf2),
 
+    ESP_ELFSYM_EXPORT(__extendsfdf2),
+
     // ESP_ELFSYM_EXPORT(__extendsftf2),
     // ESP_ELFSYM_EXPORT(__extendsfxf2),
     // ESP_ELFSYM_EXPORT(__extenddftf2),

TactilityC/Source/tt_hal.cpp

@@ -5,9 +5,14 @@
 
 extern "C" {
 
+UiDensity tt_hal_configuration_get_ui_density() {
+    auto density = tt::hal::getConfiguration()->uiDensity;
+    return static_cast<UiDensity>(density);
+}
+
 UiScale tt_hal_configuration_get_ui_scale() {
-    auto scale = tt::hal::getConfiguration()->uiScale;
-    return static_cast<UiScale>(scale);
+    auto density = tt::hal::getConfiguration()->uiDensity;
+    return static_cast<UiScale>(density);
 }
 
 }

TactilityC/Source/tt_init.cpp

@@ -273,6 +273,7 @@ const esp_elfsym main_symbols[] {
     ESP_ELFSYM_EXPORT(tt_gps_has_coordinates),
     ESP_ELFSYM_EXPORT(tt_gps_get_coordinates),
     ESP_ELFSYM_EXPORT(tt_hal_configuration_get_ui_scale),
+    ESP_ELFSYM_EXPORT(tt_hal_configuration_get_ui_density),
     ESP_ELFSYM_EXPORT(tt_hal_device_find),
     ESP_ELFSYM_EXPORT(tt_hal_display_driver_alloc),
     ESP_ELFSYM_EXPORT(tt_hal_display_driver_draw_bitmap),