- Fix bug in Development app: when launching/stopping external app due to LVGL being stopped and a timer still being active (sometimes, as it's a race condition)
- Added TODO to fix the same bug in other apps
- Update external app SDKs to `0.5.0-SNAPSHOT`
- `DisplayDevice` improvements related `DisplayDriver`
- Replaced incorrect usage of `spiBusHandle` with `spiHostDevice` in all SPI display devices
- Disabled `DisplayDriver` support for RGB displays for now
- Updated `GraphicsDemo` project for the above changes
- TactilityC improvements:
- created `tt_hal_device_find()`
- created `tt_hal_display_*`
- created `tt_hal_touch_*`
- created `tt_lvgl_*`
- export `tt_app_*` calls