Device migrations, new drivers, cleanup (#567)

* **New Features**
  * Added native display support for ST7796, ILI9341, and ST7789 panels across supported boards.
  * Added FT5x06 and FT6x36 touchscreen support.
  * Generic PWM driver
  * ESP32 PWM driver
  * Generic RGB LED driver
  * RGB PWM LED driver
  * RGB GPIO LED driver
  * Implementation of RGB LED for various boards

* **Improvements**
  * Updated board hardware descriptions to use explicit display/touch/backlight device-tree bindings and disabled deprecated HAL usage.
  * Improved display and touch-driver cleanup to prevent stale resources and improve shutdown reliability.
  * Pinned esp-hosted library to a fixed version
 
* **Deletions**
  * Obsolete placeholder display
  * Legacy ILI9488 support.
  * ESP32-specific LEDC PWM implementation

Drivers/st7796-module/include/bindings/st7796.h

@@ -0,0 +1,7 @@
+// SPDX-License-Identifier: Apache-2.0
+#pragma once
+
+#include <tactility/bindings/bindings.h>
+#include <drivers/st7796.h>
+
+DEFINE_DEVICETREE(st7796, struct St7796Config)

Drivers/st7796-module/include/drivers/st7796.h

@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: Apache-2.0
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#include <tactility/device.h>
+#include <tactility/drivers/gpio.h>
+
+struct St7796Config {
+    uint16_t horizontal_resolution;
+    uint16_t vertical_resolution;
+    int32_t gap_x;
+    int32_t gap_y;
+    bool swap_xy;
+    bool mirror_x;
+    bool mirror_y;
+    bool invert_color;
+    bool bgr_order;
+    uint32_t bits_per_pixel;
+    uint32_t pixel_clock_hz;
+    uint8_t transaction_queue_depth;
+    // Gamma curve preset index [0,3], sent via the MIPI DCS GAMSET (0x26) command at bring-up.
+    uint8_t gamma_curve;
+    struct GpioPinSpec pin_dc;
+    struct GpioPinSpec pin_reset;
+    bool reset_active_high;
+    // Optional reference to this display's backlight device, NULL if none.
+    struct Device* backlight;
+};
+
+#ifdef __cplusplus
+}
+#endif

Drivers/st7796-module/include/st7796_module.h

@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: Apache-2.0
+#pragma once
+
+#include <tactility/module.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern struct Module st7796_module;
+
+#ifdef __cplusplus
+}
+#endif