Merge develop into main (#339)

- Update ILI9341 driver to v2.0.1
- Lots of code cleanup for apps
- Refactor app "type" into "category" and added flags to the manifest (for show/hide statusbar and for hidden apps)
- Rename some ElfApp-related functionality and improved the way the static data was managed
- Rename "filebrowser" to "files"
- Added cstring functions to tt_init.cpp
- Minor fix in Boot app
- Updated external apps for SDK changes

Tactility/Source/app/boot/Boot.cpp

@@ -124,7 +124,6 @@ class BootApp : public App {
         settings::BootSettings boot_properties;
         if (!settings::loadBootSettings(boot_properties) || boot_properties.launcherAppId.empty()) {
             TT_LOG_E(TAG, "Launcher not configured");
-            stop();
             return;
         }
 
@@ -164,7 +163,8 @@ public:
 extern const AppManifest manifest = {
     .id = "Boot",
     .name = "Boot",
-    .type = Type::Boot,
+    .category = Category::System,
+    .flags = AppManifest::Flags::HideStatusBar | AppManifest::Flags::Hidden,
     .createApp = create<BootApp>
 };