New kernel drivers and device implementation updates (#561)

- Added modular device support and devicetree bindings for ILI9341, ILI9488, CST816S, XPT2046, and GPIO button input, updating several board configurations for display/touch/backlight/keyboard/battery.
- Added a setting to control deprecated HAL usage (device property + Kconfig).

TactilityKernel/source/error.cpp

@@ -31,6 +31,8 @@ const char* error_to_string(error_t error) {
             return "not allowed";
         case ERROR_BUFFER_OVERFLOW:
             return "buffer overflow";
+        case ERROR_RESOURCE_BUSY:
+            return "resource busy";
         default:
             return "unknown";
     }