New kernel drivers, filesystem API, and more (#513)

* **New Features**
  * BMI270 6-axis IMU driver added; new unified filesystem abstraction for mounted filesystems.
  * Public Wi‑Fi API surface (no implementation yet)
  * SDMMC driver added (kernel drive$)
  * expanded GPIO interrupt/callback support
* **Improvements**
  * M5Stack Tab5: revamped GPIO/power initialization and IMU integration.
  * LVGL updates including device fontSize configuration.
  * Updated all code related to SD card device/fs handling
  * Rename LilyGO T-HMI S3 to LilyGO T-HMI
* **Bug Fixes**
  * Simplified and consolidated SD card handling and mount discovery.

Platforms/platform-esp32/bindings/espressif,esp32-sdmmc.yaml

@@ -0,0 +1,53 @@
+description: ESP32 SDMMC
+
+compatible: "espressif,esp32-sdmmc"
+
+properties:
+  pin-clk:
+    type: phandle-array
+    required: true
+  pin-cmd:
+    type: phandle-array
+    required: true
+  pin-d0:
+    type: phandle-array
+    required: true
+  pin-d1:
+    type: phandle-array
+    default: GPIO_PIN_SPEC_NONE
+  pin-d2:
+    type: phandle-array
+    default: GPIO_PIN_SPEC_NONE
+  pin-d3:
+    type: phandle-array
+    default: GPIO_PIN_SPEC_NONE
+  pin-d4:
+    type: phandle-array
+    default: GPIO_PIN_SPEC_NONE
+  pin-d5:
+    type: phandle-array
+    default: GPIO_PIN_SPEC_NONE
+  pin-d6:
+    type: phandle-array
+    default: GPIO_PIN_SPEC_NONE
+  pin-d7:
+    type: phandle-array
+    default: GPIO_PIN_SPEC_NONE
+  pin-cd:
+    type: phandle-array
+    default: GPIO_PIN_SPEC_NONE
+  pin-wp:
+    type: phandle-array
+    default: GPIO_PIN_SPEC_NONE
+  bus-width:
+    type: int
+    required: true
+    description: Bus width in bits
+  wp-active-high:
+    type: boolean
+    default: false
+    description: Whether the WP pin is active high
+  enable-uhs:
+    type: boolean
+    default: false
+    description: Enable UHS mode