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

TactilityKernel/bindings/gpio-hog.yaml

@@ -0,0 +1,21 @@
+description: >
+  Claims a GPIO pin and drives it to a fixed level for as long as the module is running, with
+  no further runtime behavior. Useful for board-level power-enable pins that must be asserted
+  before other devicetree devices try to use hardware gated by that pin - all devicetree
+  devices are constructed and started during kernel_init(), which runs before the deprecated
+  HAL's initBoot() hook. Declare a gpio-hog node before the dependent device(s) in the .dts
+  source so it runs first.
+
+compatible: "gpio-hog"
+
+properties:
+  pin:
+    type: phandles
+    required: true
+    description: The GPIO pin to hog
+  mode:
+    type: int
+    default: 0
+    description: |
+      Pin mode, see enum GpioHogMode in tactility/drivers/gpio_hog.h:
+      0 = GPIO_HOG_MODE_OUTPUT_HIGH, 1 = GPIO_HOG_MODE_OUTPUT_LOW, 2 = GPIO_HOG_MODE_INPUT.