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

Boards/Simulator/Source/hal/SimulatorSdCard.h

@@ -16,7 +16,7 @@ public:
 
     SimulatorSdCard() : SdCardDevice(MountBehaviour::AtBoot),
         state(State::Unmounted),
-        lock(std::make_shared<tt::Mutex>())
+        lock(std::make_shared<tt::Mutex>(tt::Mutex::Type::Recursive))
     {}
 
     std::string getName() const override { return "Mock SD Card"; }