* **DevicetreeCompiler**
* Binding properties now support default values.
* Compiler returns meaningful exit codes and reports errors more clearly.
* Stronger validation of device configurations with unified error handling.
* Added integration tests and a dedicated Devicetree test workflow.
* **Changes**
* Platform binding schemas updated: some fields made required, others gained explicit defaults.
* Many device-tree files simplified by removing unused/placeholder pin and transfer-size entries.
* **Documentation**
* Removed several outdated TODO items.
- Add kernel support for SPI driver
- Add kernel support for UART driver
- Implemented ESP32 UART kernel driver
- Update existing UART-related code in Tactility to use new kernel driver
- Remove UART from tt::hal::Configuration
- Remove tt_hal_uart functionality but keep functions for now
- Update devicetrees for UART changes
- Kernel mutex and recursive mutex: improved locking API design
- Other kernel improvements
- Added device_exists_of_type() and device_find_by_name()
