Add TakeWhile and DropWhile family of iterators

[BooleanCat]

Please provide a brief description of the change.

Behaves in the same way as you'd expect from Python's itertools.

Which issue does this change relate to?

Request on the Go Slack.

Contribution checklist.

• [x] I have read and understood the CONTRIBUTING guidelines
• [x] All commits in my PR conform to the commit hygiene section
• [x] I have added relevant tests
• [x] I have not added any dependencies

Additional context

None.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 100.00%. Comparing base (23eca34) to head (75272b3). Report is 2 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #139 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 32 32 Lines 434 476 +42 ========================================= + Hits 434 476 +42 ```

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