Refactor SDK

[MarcAntoine-Arnaud]

• [x] Remove bind_consumer function, execute it in the new of the RabbitmqExchange
• [x] Change McaiChannel to not send a RabbitMQ channel but a Sender

Feedback {
  Progression(job_id, value),
}

• [x] Fix progress calculation for media process: add a get_duration_in_frames() function in Source
• [x] Start StartProcess in a dedicated thread (media & simple)
• [x] Share states to check if stop required or other actions
• [x] Return of direct message vs job queue
• [x] Create Response Worker Exchange and return messages on it
• [x] Add worker status : idle, busy
• [x] Make the direct messaging queue name configurable from a environment variable; generate it if this env var is not set.

[MarcAntoine-Arnaud]

Return of direct message vs job queue After discussion, all message will be returned via Response exchange or Worker Response exchange.