Fixes and improvements (#620)

- Standardized keyboard input using Unicode-based key codes across supported devices and the simulator. Keyboards don't emit `LV_KEY_*` anymore.
- Refactored lilygo encoder driver into a reusable GPIO rotary encoder driver (see `Drivers/gpio-encoder-module/`). Added more features to the config file.
- Improved LVGL keyboard device management, including duplicate prevention and reliable reconnects.
- LVGL file mutex now registers with lvgl start/stop
- Improved LVGL startup/shutdown stability and memory allocation reliability.
- Increased simulator LVGL memory capacity and improved USB device-class handling.

device.py

@@ -192,6 +192,10 @@ def write_spiram_variables(output_file, device_properties: dict):
     output_file.write("CONFIG_SPIRAM_MEMTEST=n\n")
     # Enable
     output_file.write("CONFIG_SPIRAM=y\n")
+    # Defaults to n on the classic ESP32 target (unlike S2/S3/etc), but Tactility relies on it
+    # to put some task stacks in SPIRAM (see UsbHidInput.cpp) - without it, xTaskCreateStatic()
+    # asserts at runtime when handed a SPIRAM-backed stack buffer.
+    output_file.write("CONFIG_FREERTOS_TASK_CREATE_ALLOW_EXT_MEM=y\n")
     output_file.write(f"CONFIG_{idf_target.upper()}_SPIRAM_SUPPORT=y\n")
     mode = get_property_or_exit(device_properties, "hardware.spiRamMode")
     if mode == "OPI":