Rename icons, fix T-Lora Pager config and more (#502)

* **New Features**
  * Added NFC chip-select to SD card hardware configuration.

* **Refactor**
  * Consolidated and renamed icon resources; apps and status-bar now reference unified icon headers and new icon constants.
  * Renamed LVGL lock API (timed → lvgl_try_lock) and updated callers.

* **Documentation**
  * Updated module README and license files; added Apache-2.0 license document.

Modules/lvgl-module/README.md

@@ -1,8 +1,42 @@
-**WARNING: This module contains deprecated code**
+# lvgl-module
 
-This module is the basis for the old Tactility HAL.
-This HAL existed before TactilityKernel.
+This module manages the lifecycle of the [LVGL](https://lvgl.io/) library within the Tactility ecosystem. 
 
-The C++ `tt::hal::Device` class is replaced by `struct Device` from TactilityKernel.
+## What the library does
 
-License: Apache v2.0
+The `lvgl-module` provides:
+- **Lifecycle Management**: Handles initialization and termination of the LVGL library.
+- **Task Management**: Manages the LVGL main loop task.
+- **Thread-Safety**: Provides mutex-based locking mechanisms (`lvgl_lock`, `lvgl_unlock`) to ensure safe access to LVGL APIs from multiple tasks.
+- **Font Access**: Provides a unified interface to access pre-configured text and icon fonts.
+
+## Different types of fonts
+
+The module supports two main categories of fonts:
+
+### Text Fonts
+
+Standard text rendering uses the **Montserrat** font. Three sizes are pre-configured:
+- `FONT_SIZE_SMALL`
+- `FONT_SIZE_DEFAULT`
+- `FONT_SIZE_LARGE`
+
+### Icon Fonts
+
+Icons are provided by the **Material Symbols** font, divided into three usage-specific sets:
+- **Statusbar Icons**: Optimized for the system status bar.
+- **Launcher Icons**: Sized for application launchers.
+- **Shared Icons**: General purpose icons used across the system.
+
+## How to update the fonts
+
+Font sizes and symbols are configurable:
+
+- **On ESP32 (IDF)**: Sizes can be updated via `menuconfig` or by editing `sdkconfig`. Look for `CONFIG_TT_LVGL_FONT_SIZE_*` and `CONFIG_TT_LVGL_*_ICON_SIZE` parameters.
+- **On Simulator/POSIX**: Default sizes are defined in `Modules/lvgl-module/CMakeLists.txt`.
+
+If you change an icon font size, ensure that a corresponding C file exists in `source-fonts/` (e.g., `material_symbols_shared_24.c`). These files are generated from TTF/OTF fonts using the LVGL font converter.
+
+## License
+
+This module is licensed under the [Apache v2.0](LICENSE-Apache-2.0.md) license.