refactor: rename to Quantity.DefaultProvider.Quantities

[angularsen]

Fixup of #1555

[angularsen]

Optionally merge #1575 first, this PR has both changes.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93%. Comparing base (77ada0e) to head (a43ed47).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@          Coverage Diff           @@
##           master   #1576   +/-   ##
======================================
  Coverage      93%     93%           
======================================
  Files         311     311           
  Lines       28780   28781    +1     
======================================
+ Hits        26863   26864    +1     
  Misses       1917    1917           

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[lipchev]

there is a slight performance overhead of using the interface on the private field, but if you prefer clarity- it's fine by me..

[angularsen]

This change was collateral damage, I'll revert it. The idea was to accept IReadOnlyList as input and reuse instance if compatible, but I'll do the same for array instead.

[lipchev]

Ok, i'm fine with the static initializer- we'll change it back when we start actually configuring the defaults..

[angularsen]

Sounds good