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).

Drivers/button-control-module/include/drivers/button_control.h

@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: Apache-2.0
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#include <tactility/drivers/gpio.h>
+
+struct ButtonControlConfig {
+    struct GpioPinSpec pin_primary;
+    // GPIO_PIN_SPEC_NONE selects one-button mode; see the binding description for the
+    // resulting short/long press key mapping in each mode.
+    struct GpioPinSpec pin_secondary;
+    bool active_low;
+    uint32_t debounce_ms;
+    uint32_t long_press_ms;
+};
+
+#ifdef __cplusplus
+}
+#endif