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.

Drivers/pi4ioe5v6408-module/source/module.cpp

@@ -6,7 +6,6 @@
 extern "C" {
 
 extern Driver pi4ioe5v6408_driver;
-extern const ModuleSymbol pi4ioe5v6408_module_symbols[];
 
 static error_t start() {
     /* We crash when construct fails, because if a single driver fails to construct,
@@ -26,7 +25,7 @@ Module pi4ioe5v6408_module = {
     .name = "pi4ioe5v6408",
     .start = start,
     .stop = stop,
-    .symbols = pi4ioe5v6408_module_symbols,
+    .symbols = nullptr,
     .internal = nullptr
 };