Merge develop into main (#343)

- Refactor `AppManifest`: add new fields and rename existing ones
- Parse and validate the manifest from an app that is being installed.
- Remove deprecated `scoped()` from `Lock`
- Create `Tactility/Paths.h`
- App loading at boot now properly parses the manifest files of external apps
- Properly lock both source and destination locations during app install
- Remove LVGL path variants from `AppPaths` and `ServicePaths`
- Removed `xPath` base classes for apps and services. There's now `AppPaths` and `ServicePaths`.
- Renamed app and service paths: "data" and "system" paths are now "user data" and "assets"

TactilityC/Include/tt_app.h

@@ -31,14 +31,6 @@ bool tt_app_has_result(AppHandle handle);
  */
 void tt_app_get_data_directory(AppPathsHandle handle, char* buffer, size_t* size);
 
-/** Get the path to the data directory of this app, with LVGL drive letter prefix applied.
- * The recommended buffer size is 256 bytes.
- * @param[in] handle the app handle
- * @param[out] buffer the output buffer (recommended size is 256 bytes)
- * @param[inout] size used as input for maximum buffer size (including null terminator) and is set with the path string length by this function
- */
-void tt_app_get_data_directory_lvgl(AppPathsHandle handle, char* buffer, size_t* size);
-
 /**
  * Start an app by id.
  * @param[in] appId the app manifest id