## Time & Date
- Added time to statusbar widget
- Added Time & Date Settings app
- Added TimeZone app for selecting TimeZone
- Added `tt::time` namespace with timezone code
## Other changes
- Added `SystemEvent` to publish/subscribe to system wide (e.g. for init code, but also for time settings changes)
- Changed the way the statusbar widget works: now there's only 1 that gets shown/hidden, instead of 1 instance per app instance.
- Moved `lowercase()` function to new namespace: `tt::string`
- Increased T-Deck flash & PSRAM SPI frequencies to 120 MHz (from 80 MHz)
- Temporary work-around (+ TODO item) for LVGL stack size (issue with WiFi app)
- Suppress T-Deck keystroke debugging to debug level (privacy issue)
- Improved SDL dependency wiring in various `CMakeLists.txt`
- `Loader` service had some variables renamed to the newer C++ style (from previous C style)
- Update `Configuration` to use C++ vector instead of C arrays
- Rename `Desktop` app to `Launcher`
- Fix for hard-coded app start of `Launcher` and `CrashDiagnostics` apps.
- Ensure `Launcher` icons are clickable, even if they're not loading.
- Don't show error scenario for SD card in statusbar when SD card status is unknown (this happens during Mutex timeout due to LVGL rendering delays)
- Cleanup deprecated `Mutex` methods.
- `hal::getConfiguration()` now returns a pointer instead of a reference, just like `tt:getConfiguration()`
