feat(t-deck): Add audio output and sdcard support

[finger563]

Description

• Update espp::TDeck to support audio output with same API as espp::EspBox for interoperability
• Update espp::TDeck to support sdcard configuration
• Update t-deck example to demonstrate audio the same way that the esp-box example does

Motivation and Context

Improves the utility and functionality of the device to better support the T-Deck. This is also part of the work to allow the esp-box-emu project to run on the TDeck.

How has this been tested?

Build and run t-deck/example on a TDeck and ensure it works and the sound plays correctly.

Screenshots (if appropriate, e.g. schematic, board, console logs, lab pictures):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update
• Hardware (schematic, board, system design) change
• Software change

Checklist:

• My change requires a change to the documentation.
• I have added / updated the documentation related to this change via either README or WIKI

Software

• I have added tests to cover my changes.
• I have updated the .github/workflows/build.yml file to add my new test to the automated cloud build github action.
• All new and existing tests passed.
• My code follows the code style of this project.

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[github-actions]

✅Static analysis result - no issues found! ✅

[Copilot]

Pull Request Overview

This PR adds audio output and SD card support to the TDeck platform while updating related documentation and example code.

• Adds SPI bus initialization for shared LCD, SD card, and audio support.
• Implements I2S-based audio playback and SD card mounting functionality.
• Updates the t-deck example to demonstrate audio controls alongside existing features.

Reviewed Changes

Copilot reviewed 8 out of 10 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
components/t-deck/src/t-deck.cpp	Adds SPI bus initialization and configures CS pins for peripherals.
components/t-deck/src/sdcard.cpp	Implements SD card initialization with FAT filesystem mounting.
components/t-deck/src/buttons.cpp	Introduces boot button initialization with interrupt support.
components/t-deck/src/audio.cpp	Adds I2S audio support, audio task callback, and playback functions.
components/t-deck/include/t-deck.hpp	Updates header to expose new audio and SD card APIs.
components/t-deck/example/main/t_deck_example.cpp	Updates example to load and play audio, and demonstrate volume/mute control.
components/esp-box/include/esp-box.hpp	Minor update to alias definitions for consistency.

Files not reviewed (2)

• components/t-deck/CMakeLists.txt: Language not supported
• components/t-deck/example/main/CMakeLists.txt: Language not supported

Comments suppressed due to low confidence (1)

components/t-deck/src/audio.cpp:170

• The flag 'has_sound' is set to true after queuing audio but is never reset, which may cause subsequent calls to block indefinitely. Consider resetting this flag once the audio task completes processing.

  play_audio_task_handle_ = xTaskGetCurrentTaskHandle();

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