Modernization 202603: Update rodio to the official crate, update cpal and most dependencies

[pragmatrix]

Manual tests:

• Open AI Dialog
• Azure Transcribe
• Azure Synthesize
• Azure Translate
• Google Transcribe Not Needed for now.

[Copilot]

Pull request overview

This PR modernizes the Rust workspace by switching to the official rodio crate and updating cpal and a broad set of other dependencies, with accompanying code updates to match newer APIs (notably around audio playback and WebSocket message types).

Changes:

• Update audio stack dependencies (notably rodio, cpal) and adapt playback code to newer NonZero*-based APIs.
• Update WebSocket server code for newer axum APIs (listener tapping, message payload types) and minor protocol parsing refactors.
• Bump crate versions to 2.0.0 and refresh several dependency versions across services/examples.

Reviewed changes

Copilot reviewed 24 out of 24 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
services/playback/src/lib.rs	Update rodio conversion/resampling call sites to NonZeroU16/NonZeroU32 and enforce non-zero output format fields.
services/playback/Cargo.toml	Bump bytes dependency.
services/openai-dialog/src/lib.rs	Import ordering cleanup and comment typo fix.
services/openai-dialog/Cargo.toml	Bump tokio-tungstenite version.
services/google-transcribe/src/lib.rs	Replace boxed interceptor closure with a tonic::service::Interceptor implementation.
filter-test/Cargo.toml	Bump fundsp version.
examples/openai-dialog.rs	Update rodio playback API usage and adjust format/sample-rate handling for newer cpal/rodio types.
examples/azure-translate.rs	Update rodio playback API usage; keep an output sink alive for Bluetooth headset profile switching; split input/output formats.
examples/azure-transcribe.rs	Keep output sink alive for Bluetooth headsets; improve error context for default input device; adjust sample rate handling.
examples/azure-synthesize.rs	Update rodio playback API usage and Source trait signature changes.
examples/azure-container.rs	Keep output sink alive for Bluetooth headsets; adjust sample rate handling.
examples/aristech-transcribe.rs	Keep output sink alive for Bluetooth headsets; adjust stream config/sample rate handling for newer cpal.
examples/aristech-synthesize.rs	Update rodio playback API usage and Source trait signature changes.
core/Cargo.toml	Bump context-switch-core version to 2.0.0.
audio-test/Cargo.toml	Bump tracing-subscriber and indicatif versions.
audio-knife/src/mod_audio_fork.rs	Adjust WebSocket message construction to new Message payload types.
audio-knife/src/main.rs	Update axum routing and server setup (per-connection TCP_NODELAY via listener tap); adjust WS ping/pong payload type handling; JSON decoding refactor.
audio-knife/Cargo.toml	Bump audio-knife version and update axum dependency.
Cargo.toml	Bump workspace crate version, rust-version, and many dependency versions; switch from local rodio submodule to crates.io.
.gitmodules	Remove rodio submodule and update openai submodule branch value.
.github/copilot-instructions.md	Add repository-specific coding/style instructions.

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