Add custom icon fonts to lvgl-module (#499)

* **New Features**
  * Added Material Design symbol fonts and LVGL font aliases for launcher, status bar, and shared UI icons.

* **Style**
  * Migrated app icons across the UI to the new symbol font system.
  * Updated launcher button sizing, font styling, recoloring and icon text color for consistency.
  * Default text/icon font macros set for consistent sizing across the UI.

* **Documentation**
  * Updated third‑party notices to include Material Design Icons links.

Tactility/Source/app/settings/Settings.cpp

@@ -2,8 +2,10 @@
 #include <Tactility/lvgl/Toolbar.h>
 #include <Tactility/service/loader/Loader.h>
 
-#include <Tactility/Assets.h>
 #include <tactility/check.h>
+#include <tactility/lvgl_symbols_shared.h>
+#include <tactility/lvgl_fonts.h>
+
 #include <lvgl.h>
 
 #include <algorithm>
@@ -17,9 +19,11 @@ static void onAppPressed(lv_event_t* e) {
 
 static void createWidget(const std::shared_ptr<AppManifest>& manifest, void* parent) {
     check(parent);
-    auto* list = (lv_obj_t*)parent;
-    const void* icon = !manifest->appIcon.empty() ? manifest->appIcon.c_str() : TT_ASSETS_APP_ICON_FALLBACK;
+    auto* list = static_cast<lv_obj_t*>(parent);
+    const void* icon = !manifest->appIcon.empty() ? manifest->appIcon.c_str() : LVGL_SYMBOL_TOOLBAR;
     auto* btn = lv_list_add_button(list, icon, manifest->appName.c_str());
+    lv_obj_t* image = lv_obj_get_child(btn, 0);
+    lv_obj_set_style_text_font(image, LVGL_SYMBOL_FONT_DEFAULT, LV_PART_MAIN);
     lv_obj_add_event_cb(btn, &onAppPressed, LV_EVENT_SHORT_CLICKED, (void*)manifest.get());
 }
 
@@ -48,7 +52,7 @@ class SettingsApp final : public App {
 extern const AppManifest manifest = {
     .appId = "Settings",
     .appName = "Settings",
-    .appIcon = TT_ASSETS_APP_ICON_SETTINGS,
+    .appIcon = LVGL_SYMBOL_SETTINGS,
     .appCategory = Category::System,
     .appFlags = AppManifest::Flags::Hidden,
     .createApp = create<SettingsApp>