Support waiting on condition variable until a specific time point

[bjsowa]

This is my proposal for supporting waiting on condition variable till a specific time point. For now, I only implemented it for unix. If this gets approved, I can implement this function for the rest of the ports.

[github-actions]

PR missing one of the required labels: {'new feature', 'enhancement', 'dependencies', 'internal', 'documentation', 'breaking-change', 'bug'}

[jean-roland]

Hello @bjsowa, thanks for your contribution. Just to make sure since your PR is in draft, do you want us to give it a look as is?

[bjsowa]

Hello @bjsowa, thanks for your contribution. Just to make sure since your PR is in draft, do you want us to give it a look as is?

Yes, I would like to discuss the interface first. Once it's approved, I will implement it for different ports

[jean-roland]

OK then we'll check this a bit later, when we have time™.

[jean-roland]

Hey @bjsowa, the approach looks fine to us.

Just a note, since we're in the process of releasing Zenoh 1.0, we'll only be able to merge the changes after the release.