Add incubator ComposableAnnotatingSampler

[anuraaga]

This finishes up the implementation of the development spec composable samplers. I don't know how commonly used annotating will be but it's very easy to implement

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.19%. Comparing base (578f82b) to head (c4cd153).

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #7804   +/-   ##
=========================================
  Coverage     90.18%   90.19%           
- Complexity     7226     7230    +4     
=========================================
  Files           820      821    +1     
  Lines         21790    21805   +15     
  Branches       2135     2135           
=========================================
+ Hits          19651    19666   +15     
  Misses         1468     1468           
  Partials        671      671           

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[jack-berg]

Thanks!

[anuraaga]

Sorry for the delay - fixed the conflicts