Improve WhisperX implementation

.devcontainer/devcontainer.json

.devcontainer/docker-compose.yml

.github/workflows/docker-publish.yml

.gitignore

Dockerfile

Dockerfile.gpu

README.md

app/asr_models/asr_model.py

app/asr_models/faster_whisper_engine.py

app/asr_models/mbain_whisperx_engine.py

app/asr_models/openai_whisper_engine.py

app/config.py

app/factory/asr_model_factory.py

app/utils.py

docker-compose.gpu.yml

docker-compose.yml

docs/.overrides/main.html

docs/build.md

docs/endpoints.md

docs/environmental-variables.md