create cli/a

delete backend/A

upload files

delete utils.py

delete timeline_builder.py

delete orchestrator.py

delete models.py

delete logger.py

delete ffmpeg_generator.py

delete ffmpeg_executor.py

delete config_parser.py

create backend/A

delete backend

upload files

create backend

update README.md

update README.md

update README.md

update README.md

update README.md