Add kernel drivers for SPI and UART and make locking APIs more consistent (#489)

- 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()

Tactility/Include/Tactility/hal/Configuration.h

@@ -2,8 +2,6 @@
 
 #include <Tactility/hal/sdcard/SdCardDevice.h>
 #include <Tactility/hal/spi/Spi.h>
-#include <Tactility/hal/uart/Uart.h>
-#include "i2c/I2c.h"
 
 namespace tt::hal {
 
@@ -43,9 +41,6 @@ struct Configuration {
 
     /** A list of SPI interface configurations */
     const std::vector<spi::Configuration> spi = {};
-
-    /** A list of UART interface configurations */
-    const std::vector<uart::Configuration> uart = {};
 };
 
 } // namespace