Add Crop method for Grid

[eliascarv]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 74.17219% with 39 lines in your changes missing coverage. Please review.

Project coverage is 88.02%. Comparing base (d5477dc) to head (c9d95e7).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/utils/misc.jl	75.40%	30 Missing ⚠️
src/transforms/crop.jl	57.14%	6 Missing ⚠️
src/indices.jl	62.50%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1041      +/-   ##
==========================================
- Coverage   88.42%   88.02%   -0.41%     
==========================================
  Files         186      186              
  Lines        5676     5778     +102     
==========================================
+ Hits         5019     5086      +67     
- Misses        657      692      +35     

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[juliohm]

Still needs to handle cases where some of the findfirst and findlast return nothing.