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/addgps/AddGps.cpp

@@ -175,7 +175,8 @@ extern const AppManifest manifest = {
     .id = "AddGps",
     .name = "Add GPS",
     .icon = LV_SYMBOL_GPS,
-    .type = Type::Hidden,
+    .category = Category::System,
+    .flags = AppManifest::Flags::Hidden,
     .createApp = create<AddGpsApp>
 };