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"

Tactility/Include/Tactility/Paths.h

@@ -0,0 +1,21 @@
+#pragma once
+
+#include <string>
+
+namespace tt {
+
+bool findFirstMountedSdCardPath(std::string& path);
+
+std::string getSystemRootPath();
+
+std::string getTempPath();
+
+std::string getAppInstallPath();
+
+std::string getAppInstallPath(const std::string& appId);
+
+std::string getUserPath();
+
+std::string getAppUserPath(const std::string& appId);
+
+}