feat(data-structures): stabilize Deque

[tomas-zijdemans]

I consider Deque to be feature-complete and the external API stable. We could add more functions like some, every or indexOf, but these are all convenience helpers that are addable post-stabilization as non-breaking additions, so not a reason to hold.

The performance improvements that were scoped out here, can also be considered post stabilization as they are purely internal (if they are ever proposed)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.43%. Comparing base (a3a6ef6) to head (cb78fb6).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7092   +/-   ##
=======================================
  Coverage   94.43%   94.43%           
=======================================
  Files         630      630           
  Lines       50566    50567    +1     
  Branches     8969     8969           
=======================================
+ Hits        47750    47751    +1     
  Misses       2247     2247           
  Partials      569      569           

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