feat: align Sequences with difflib before being diffed

[dpinol]

Now [0, 1, 2, 3] vs [1, 2, 3] produces exactly one DiffEntry — [0]: - 0.

[codspeed-hq]

Merging this PR will not alter performance

✅ 9 untouched benchmarks

---

_{Comparing dpinol:align-diffs (f0c228c) with main (2349734)}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (2349734) to head (f0c228c).

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #17   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           34        34           
  Lines         4713      4755   +42     
  Branches      1020      1030   +10     
=========================================
+ Hits          4713      4755   +42     

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[Solganis]

Sorry, can't merge it without running this code myself. I will review it asap after the vacation.