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.

Devices/lilygo-thmi/Source/devices/Display.cpp

@@ -0,0 +1,45 @@
+#include <Xpt2046SoftSpi.h>
+#include <Tactility/hal/touch/TouchDevice.h>
+
+#include "Display.h"
+#include "PwmBacklight.h"
+#include "St7789i8080Display.h"
+
+static bool touchSpiInitialized = false;
+
+static std::shared_ptr<tt::hal::touch::TouchDevice> createTouch() {
+    auto config = std::make_unique<Xpt2046SoftSpi::Configuration>(
+        TOUCH_MOSI_PIN,
+        TOUCH_MISO_PIN,
+        TOUCH_SCK_PIN,
+        TOUCH_CS_PIN,
+        DISPLAY_HORIZONTAL_RESOLUTION,
+        DISPLAY_VERTICAL_RESOLUTION
+    );
+
+    return std::make_shared<Xpt2046SoftSpi>(std::move(config));
+}
+
+std::shared_ptr<tt::hal::display::DisplayDevice> createDisplay() {
+    // Create configuration
+    auto config = St7789i8080Display::Configuration(
+        DISPLAY_CS,   // CS
+        DISPLAY_DC,   // DC
+        DISPLAY_WR,   // WR
+        DISPLAY_RD,   // RD
+        { DISPLAY_I80_D0, DISPLAY_I80_D1, DISPLAY_I80_D2, DISPLAY_I80_D3,
+          DISPLAY_I80_D4, DISPLAY_I80_D5, DISPLAY_I80_D6, DISPLAY_I80_D7 }, // D0..D7
+        DISPLAY_RST,   // RST
+        DISPLAY_BL   // BL
+    );
+    
+    // Set resolution explicitly
+    config.horizontalResolution = DISPLAY_HORIZONTAL_RESOLUTION;
+    config.verticalResolution = DISPLAY_VERTICAL_RESOLUTION;
+    config.backlightDutyFunction = driver::pwmbacklight::setBacklightDuty;
+    config.touch = createTouch();
+    config.invertColor = false;
+    
+    auto display = std::make_shared<St7789i8080Display>(config);
+    return display;
+}