feat(jvm): Return DoubleEndedIterator for InstructionList.

[dload0]

A small quality of life for InstructionList. Removes the need for unnecessary clones in some use cases (for using .rev() on borrowed instances).

Doesn't affect existing code, however I'm not used to API building, so feel free to shoot this down. 😄

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.94%. Comparing base (bb84684) to head (0b97d2a).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #15   +/-   ##
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  Coverage   77.93%   77.94%           
=======================================
  Files          51       51           
  Lines        5329     5331    +2     
  Branches     5329     5331    +2     
=======================================
+ Hits         4153     4155    +2     
  Misses        534      534           
  Partials      642      642           

Flag	Coverage Δ
integration_tests	61.20% <100.00%> (+0.01%)	⬆️
unit_tests	25.45% <0.00%> (-0.01%)	⬇️

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[henryhchchc]

Thanks for your contribution. I think we can try DoubleEndedIterator + ExactSizeIterator.

[henryhchchc]

Perfect. Thanks a lot for your contribution.