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.

Tactility/Source/Paths.cpp

@@ -2,25 +2,37 @@
 
 #include <Tactility/app/AppManifestParsing.h>
 #include <Tactility/MountPoints.h>
-#include <Tactility/hal/sdcard/SdCardDevice.h>
 
 #include <format>
+#include <tactility/filesystem/file_system.h>
 
 namespace tt {
 
 bool findFirstMountedSdCardPath(std::string& path) {
-    // const auto sdcards = hal::findDevices<hal::sdcard::SdCardDevice>(hal::Device::Type::SdCard);
-    bool is_set = false;
-    hal::findDevices<hal::sdcard::SdCardDevice>(hal::Device::Type::SdCard, [&is_set, &path](const auto& device) {
-        if (device->isMounted()) {
-            path = device->getMountPath();
-            is_set = true;
-            return false; // stop iterating
-        } else {
-            return true;
+    auto* fs = findSdcardFileSystem(true);
+    if (fs == nullptr) return false;
+    char found_path[128];
+    if (file_system_get_path(fs, found_path, sizeof(found_path)) != ERROR_NONE) return false;
+    path = found_path;
+    return true;
+}
+
+FileSystem* findSdcardFileSystem(bool mustBeMounted) {
+    FileSystem* found = nullptr;
+    file_system_for_each(&found, [](auto* fs, void* context) {
+        char path[128];
+        if (file_system_get_path(fs, path, sizeof(path)) != ERROR_NONE) return true;
+        // TODO: Find a better way to identify SD card paths
+        if (std::string(path).starts_with("/sdcard")) {
+            *static_cast<FileSystem**>(context) = fs;
+            return false;
         }
+        return true;
     });
-    return is_set;
+    if (found && mustBeMounted && !file_system_is_mounted(found)) {
+        return nullptr;
+    }
+    return found;
 }
 
 std::string getSystemRootPath() {