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

ExternalApps/GraphicsDemo/tactility.py

@@ -14,7 +14,7 @@ import shutil
 import configparser
 
 ttbuild_path = ".tactility"
-ttbuild_version = "2.1.0"
+ttbuild_version = "2.1.1"
 ttbuild_cdn = "https://cdn.tactility.one"
 ttbuild_sdk_json_validity = 3600  # seconds
 ttport = 6666
@@ -618,7 +618,7 @@ if __name__ == "__main__":
             print_help()
             exit_with_error("Commandline parameter missing")
         uninstall_action(manifest, sys.argv[2])
-    elif action_arg == "bir":
+    elif action_arg == "bir" or action_arg == "brrr":
         if len(sys.argv) < 3:
             print_help()
             exit_with_error("Commandline parameter missing")