Add collectWithIndex function to ReadonlyRecord module

[davidecaruso]

Added function to ReadonlyRecord module to collect values preserving indexes.

[xzhayon]

If you want to adhere to fp-ts style, it should be collectWithIndex.

[codecov-commenter]

Codecov Report

Base: 70.52% // Head: 70.56% // Increases project coverage by +0.04% 🎉

Coverage data is based on head (078e284) compared to base (b2275d9).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #50      +/-   ##
==========================================
+ Coverage   70.52%   70.56%   +0.04%     
==========================================
  Files          47       47              
  Lines        2534     2538       +4     
  Branches      248      248              
==========================================
+ Hits         1787     1791       +4     
  Misses        720      720              
  Partials       27       27              

Impacted Files	Coverage Δ
src/ReadonlyRecord.ts	100.00% <100.00%> (ø)

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[xzhayon]

lgtm