Allow to run async tasks and catch and log them appropriately on failure

[LoicPoullain]

Issue

Sometimes, we want to run an asynchronous function without awaiting for it (for example when sending a message to Slack in a request). If the function rejects an error, we want to catch and log it appropriately.

Solution and steps

• Add an AsyncService for that purpose.

Checklist

• Add/update/check docs (code comments and docs/ folder).
• Add/update/check tests.
• Update/check the cli generators.