refactor(core): Architecturally decouple Audio, ASR, and TTS modules

Refactor threading in `launcher.py` to standardize worker initialization, enforce daemon mode, and improve naming consistency.

Handle overflow errors in audio capture by adding `exception_on_overflow=False` and skip processing when no data is available.

Add `--disable-echo-cancellation` CLI option and update audio pipeline to support toggling echo cancellation and VAD

Refactor to replace `EchoCancellingAudioCapture` with `AudioCapture` across the codebase for improved clarity and flexibility

Enhance launcher startup log formatting for improved readability and visual appeal

Replace `logging` with centralized `loguru`-based logger across all modules.

Refactor project: split `main.py` functionality into modular components under `cli`, `core`, and `config`.