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/m5stack-tab5/m5stack,tab5.dts

@@ -5,6 +5,7 @@
 #include <tactility/bindings/esp32_i2c.h>
 #include <tactility/bindings/esp32_i2s.h>
 #include <tactility/bindings/esp32_spi.h>
+#include <bindings/bmi270.h>
 #include <bindings/pi4ioe5v6408.h>
 
 / {
@@ -23,35 +24,20 @@
 		pin-sda = <&gpio0 31 GPIO_FLAG_NONE>;
 		pin-scl = <&gpio0 32 GPIO_FLAG_NONE>;
 
-		/*
-		 - Bit 0: RF internal/external switch
-		 - Bit 1: Speaker enable
-		 - Bit 2: External 5V bus enable
-		 - Bit 3: /
-		 - Bit 4: LCD reset
-		 - Bit 5: Touch reset
-		 - Bit 6: Camera reset
-		 - Bit 7: Headphone detect
-		 */
 		io_expander0 {
 			compatible = "diodes,pi4ioe5v6408";
 			reg = <0x43>;
 		};
 
-		/*
-		 - Bit 0: C6 WLAN enable
-		 - Bit 1: /
-		 - Bit 2: /
-		 - Bit 3: USB-A 5V enable
-		 - Bit 4: Device power: PWROFF_PLUSE
-		 - Bit 5: IP2326: nCHG_QC_EN
-		 - Bit 6: IP2326: CHG_STAT_LED
-		 - Bit 7: IP2326: CHG_EN
-		*/
 		io_expander1 {
 			compatible = "diodes,pi4ioe5v6408";
 			reg = <0x44>;
 		};
+
+		bmi270 {
+			compatible = "bosch,bmi270";
+			reg = <0x68>;
+		};
 	};
 
 	i2c_port_a: i2c1 {