Detect moved items in ordered iterables

[akshat62]

Summary

• detect reverse difflib replacements as item moves
• test that list swaps report iterable_item_moved
• document iterable_item_moved usage

[codecov]

Codecov Report

❌ Patch coverage is 96.66667% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 96.08%. Comparing base (b639fec) to head (9f11980).

Files with missing lines	Patch %	Lines
deepdiff/diff.py	96.66%	1 Missing ⚠️

Additional details and impacted files

@@ Coverage Diff @@ ## master #563 +/- ## ======================================= Coverage 96.07% 96.08% ======================================= Files 16 16 Lines 4463 4490 +27 ======================================= + Hits 4288 4314 +26  - Misses 175 176 +1 

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