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/files/FilesApp.cpp

@@ -0,0 +1,48 @@
+#include <Tactility/app/files/View.h>
+#include <Tactility/app/files/State.h>
+#include <Tactility/app/AppContext.h>
+
+#include <Tactility/Assets.h>
+#include <Tactility/service/loader/Loader.h>
+
+#include <memory>
+
+namespace tt::app::files {
+
+extern const AppManifest manifest;
+
+class FilesApp final : public App {
+
+    std::unique_ptr<View> view;
+    std::shared_ptr<State> state;
+
+public:
+
+    FilesApp() {
+        state = std::make_shared<State>();
+        view = std::make_unique<View>(state);
+    }
+
+    void onShow(AppContext& appContext, lv_obj_t* parent) override {
+        view->init(appContext, parent);
+    }
+
+    void onResult(AppContext& appContext, TT_UNUSED LaunchId launchId, Result result, std::unique_ptr<Bundle> bundle) override {
+        view->onResult(launchId, result, std::move(bundle));
+    }
+};
+
+extern const AppManifest manifest = {
+    .id = "Files",
+    .name = "Files",
+    .icon = TT_ASSETS_APP_ICON_FILES,
+    .category = Category::System,
+    .flags = AppManifest::Flags::Hidden,
+    .createApp = create<FilesApp>
+};
+
+void start() {
+    service::loader::startApp(manifest.id);
+}
+
+} // namespace