Add versioned HTTP API

[dborovcanin]

Is your feature request related to a problem? Please describe.

As we approach 1.0, we should start thinking of versioning our API.

Describe the feature you are requesting, as well as the possible use case(s) for it.

While we will make the best effort to keep post-v1.0 API compatible, there is no guarantee that will be possible. For those reasons, we should add versioning to enable using old API and seamlessly switch to newer versions of Magistrala.

Indicate the importance of this feature to you.

Must-have

Anything else?

No response