Remove old HAL components and refactored GPS-related code (#583)

- Added generic GPS/GNSS support with device detection, configuration, and persistent settings.
- Improved device and module lifecycle management.
- Added flexible filesystem locking support for displays and storage.
- Improved display-idle and keyboard backlight handling.
- Updated architecture, driver, module, testing, and licensing documentation.
- Removed old HAL device and related code.

TactilityKernel/source/drivers/keyboard.cpp

@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: Apache-2.0
 #include <tactility/drivers/keyboard.h>
+#include <tactility/error.h>
 #include <tactility/device.h>
 
 #define KEYBOARD_DRIVER_API(driver) ((struct KeyboardApi*)driver->api)
@@ -11,6 +12,16 @@ error_t keyboard_read_key(Device* device, KeyboardKeyData* data) {
     return KEYBOARD_DRIVER_API(driver)->read_key(device, data);
 }
 
+error_t keyboard_get_backlight(Device* device, Device** backlight_device) {
+    const auto* driver = device_get_driver(device);
+
+    if (KEYBOARD_DRIVER_API(driver)->get_backlight == nullptr) {
+        return ERROR_NOT_SUPPORTED;
+    }
+
+    return KEYBOARD_DRIVER_API(driver)->get_backlight(device, backlight_device);
+}
+
 const DeviceType KEYBOARD_TYPE {
     .name = "keyboard"
 };