feat: collapse unified diffs, add interactive diff expansion, upgrade…

[ffalcinelli]

… scaffolding UI to fuzzy matching and auto-discover realms, and update documentation

[codecov]

Codecov Report

❌ Patch coverage is 89.78102% with 42 lines in your changes missing coverage. Please review.
✅ Project coverage is 95.08%. Comparing base (480053b) to head (f49f135).

Files with missing lines	Patch %	Lines
src/apply/components.rs	50.00%	14 Missing ⚠️
src/plan/components.rs	55.00%	9 Missing ⚠️
src/apply/generic.rs	92.59%	8 Missing ⚠️
src/apply/mod.rs	90.24%	4 Missing ⚠️
src/plan/mod.rs	90.24%	4 Missing ⚠️
src/plan/generic.rs	82.35%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #166      +/-   ##
==========================================
- Coverage   95.82%   95.08%   -0.74%     
==========================================
  Files          28       29       +1     
  Lines        2346     2726     +380     
==========================================
+ Hits         2248     2592     +344     
- Misses         98      134      +36     

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