Migrate devices, create drivers, other improvements & fixes (#574)

Migrated devices to kernel drivers:

- guition-jc3248w535c
- m5stack-core2
- m5stack-cores3
- m5stack-papers3

New drivers:

- axp192-module
- axp2101-module

Fixes:

- Fix SD card LDO for P4 devices
- Updated PowerOff app to work with kernel displays
- Fix for `lvgl_try_lock()` timing
- Fix for touch events with slow updating displays

Improvements:

- `GuiService` now keeps trying to lock to prevent silent failures caused by drivers.
- `GuiService` now uses lvgl-module calls for locking/unlocking
- display driver now has capability `DISPLAY_CAPABILITY_SLOW_REFRESH`

Drivers/axp2101-module/include/drivers/axp2101_backlight.h

@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: Apache-2.0
+#pragma once
+
+#include <stdint.h>
+
+#include <drivers/axp2101.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Devicetree configuration for a backlight driven by a switchable/adjustable AXP2101 LDO.
+ */
+struct Axp2101BacklightConfig {
+    /** The AXP2101 LDO powering the backlight */
+    enum Axp2101Ldo ldo;
+    /** LDO voltage at brightness level 0. Brightness level 0 always disables the LDO outright,
+     * rather than actually driving it to this voltage - see set_brightness() in BacklightApi. */
+    uint16_t min_millivolt;
+    /** LDO voltage at the maximum brightness level (255) */
+    uint16_t max_millivolt;
+    /** Default brightness level, applied by set_brightness_default() */
+    uint8_t brightness_default;
+};
+
+#ifdef __cplusplus
+}
+#endif