chore(examples): start examples overhaul #1166
                
     Merged
            
            
          
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📝 Summary
Main change is an overhaul of one of the examples. This it the first example to be adapted and more will be adapted.
In addition, the dependencies were simplified:
coverageis included bypytest-covpytest-rerunfailureswon't be needed when the broker has been removed.pytest-xdisttesting going back to single threads🚨 Breaking Changes🔥 Motivation
To eventually create a comprehensive and pedagogical set of examples.
🔨 Test Plan
CI
🔗 Related issues/PRs