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()

Modules/lvgl-module/Source/arch/lvgl_posix.c

@@ -45,7 +45,7 @@ bool lvgl_lock(void) {
 
 bool lvgl_try_lock_timed(uint32_t timeout) {
     if (!lvgl_mutex_initialised) return false;
-    return recursive_mutex_try_lock_timed(&lvgl_mutex, millis_to_ticks(timeout));
+    return recursive_mutex_try_lock(&lvgl_mutex, millis_to_ticks(timeout));
 }
 
 void lvgl_unlock(void) {