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/Source/Tactility.cpp

@@ -26,8 +26,9 @@
 #include <Tactility/settings/TimePrivate.h>
 
 #include <tactility/concurrent/thread.h>
-#include <tactility/kernel_init.h>
+#include <tactility/drivers/uart_controller.h>
 #include <tactility/hal_device_module.h>
+#include <tactility/kernel_init.h>
 #include <tactility/lvgl_module.h>
 
 #ifdef ESP_PLATFORM
@@ -180,7 +181,7 @@ static void registerInternalApps() {
     addAppManifest(app::chat::manifest);
 #endif
 
-    if (!hal::getConfiguration()->uart.empty()) {
+    if (device_exists_of_type(&UART_CONTROLLER_TYPE)) {
         addAppManifest(app::addgps::manifest);
         addAppManifest(app::gpssettings::manifest);
     }