Merge develop into main (#327)

## New features
- Implemented support for app packaging in firmware and `tactility.py`: load `.app` files instead of `.elf` files. Install apps remotely or via `FileBrowser`.
- Ensure headless mode works: all services that require LVGL can deal with the absence of a display
- Service `onStart()` is now allowed to fail (return `bool` result)
- Added and improved various file-related helper functions

## Improvements
- Completely revamped the SystemInfo app UI
- Improved Calculator UI of internal and external variant
- Fix Chat UI and removed the emoji buttons for now
- Fix for toolbar bottom padding issue in all apps

## Fixes
- Fix for allowing recursive locking for certain SPI SD cards
& more

Tactility/Include/Tactility/app/App.h

@@ -94,4 +94,10 @@ std::shared_ptr<AppContext> _Nullable getCurrentAppContext();
 /** @return the currently running app (it is only ever null before the splash screen is shown) */
 std::shared_ptr<App> _Nullable getCurrentApp();
 
+std::string getTempPath();
+
+std::string getInstallPath();
+
+bool install(const std::string& path);
+
 }

Tactility/Include/Tactility/app/ElfApp.h

@@ -26,13 +26,6 @@ void setElfAppManifest(
     OnResult _Nullable onResult
 );
 
-/**
- * @return the app ID based on the executable's file path.
- */
-std::string getElfAppId(const std::string& filePath);
-
-void registerElfApp(const std::string& filePath);
-
 std::shared_ptr<App> createElfApp(const std::shared_ptr<AppManifest>& manifest);
 
 }

Tactility/Include/Tactility/app/alertdialog/AlertDialog.h

@@ -4,6 +4,7 @@
 
 #include <string>
 #include <vector>
+#include <Tactility/app/App.h>
 
 /**
  * Start the app by its ID and provide:
@@ -18,15 +19,17 @@ namespace tt::app::alertdialog {
      * @param[in] title the title to show in the toolbar
      * @param[in] message the message to display
      * @param[in] buttonLabels the buttons to show
+     * @return the launch id
      */
-    void start(const std::string& title, const std::string& message, const std::vector<std::string>& buttonLabels);
+    LaunchId start(const std::string& title, const std::string& message, const std::vector<std::string>& buttonLabels);
 
     /**
      * Show a dialog with the provided title, message and an OK button
      * @param[in] title the title to show in the toolbar
      * @param[in] message the message to display
+     * @return the launch id
      */
-    void start(const std::string& title, const std::string& message);
+    LaunchId start(const std::string& title, const std::string& message);
 
     /**
      * Get the index of the button that the user selected.