chore(remove): event-hubs pump project

[stijnmoreels]

The Messaging library previously supported both Service bus and Event Hubs as message pumps. Due to maintainence costs, and the sheldom usage of message handling in event-sourcing systems, the maintainence cost for this is too high.

Related to the exercise described here #470 , this PR removes the Event Hubs message pump and related feature documentation. This can still be done in a minor release, as separate projects means separate NuGet packages. We only have to archive the NuGet package once we're finished with the release.

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[fgheysels]

Just wondering if we shouldn't first deprecate before removing ?
We can have an offline chat on that.

Not necessary, I see since it's in a separate project we can just do that.

[fgheysels]

I still think it's a pity to remove this pump though.
I wonder if the maintenance cost is that high ? We might not use it very much atm, but I do see use-cases. (Could've used it in the past in one of our projects f.i.)

[stijnmoreels]

I still think it's a pity to remove this pump though. I wonder if the maintenance cost is that high ? We might not use it very much atm, but I do see use-cases. (Could've used it in the past in one of our projects f.i.)

This is only one project of four related to EventHubs. Wanted to do this in steps.
Yes, I believe with the current budget and people, this is rather high maintenance as we don’t even have time to fully upgrade Service bus-related projects. And taking OpenTelemetry into account, there will be much migration/backwards-compatibility needed there, too.

And since this is mostly falling on my shoulders, I don’t believe I have the necessary space to do that all by myself.