Add iter.ForEach

[Rajan-226]

Please provide a brief description of the change.

A sentence or two is fine, the rest should be clear from the code change and related issue.
It adds for each for iterator package, which can execute a callback on each item contained by an iterator.

Which issue does this change relate to?

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#45

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Contribution checklist.

Replace the space in each box with "X" to check it off.

• I have read and understood the CONTRIBUTING guidelines
• My code is formatted (make check)
• I have run tests (make test)
• All commits in my PR conform to the commit hygiene section
• I have added relevant tests
• I have not added any dependencies

Additional context

Add any other context about the problem here.

[BooleanCat]

Thanks for the contribution! It looks good and I have a few requests in line and here:

1. Please move the implementation into iter.go
2. Please move the tests into iter_test.go

A note on the file name you've chosen, in Go the convention is to use snake_case_test.go.

I'll run the tests for you now in case I missed anything.

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (2141361) 100.00% compared to head (1aacaae) 100.00%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #53   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           19        19           
  Lines          376       382    +6     
=========================================
+ Hits           376       382    +6     

Files Changed	Coverage Δ
iter/iter.go	100.00% <100.00%> (ø)

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[Rajan-226]

@BooleanCat Have done the changes, I think find should also go in iter.go though.

[BooleanCat]

@BooleanCat Have done the changes, I think find should also go in iter.go though.

Good point and I agree. Feel free to submit a PR with this change otherwise I'll move it next time I'm near that code.

[BooleanCat]

@Rajan-226 Thanks for your contribution!