feat: Optionally allow inserting tabs as spaces

[marc2332]

Closes #662

[codecov]

Codecov Report

Attention: Patch coverage is 44.68085% with 26 lines in your changes missing coverage. Please review.

Project coverage is 73.81%. Comparing base (9d37c3c) to head (24c8295).
Report is 1 commits behind head on main.

Files	Patch %	Lines
crates/hooks/src/use_editable.rs	57.57%	14 Missing ⚠️
crates/hooks/src/text_editor.rs	0.00%	9 Missing ⚠️
crates/hooks/src/rope_editor.rs	40.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #664      +/-   ##
==========================================
- Coverage   73.90%   73.81%   -0.09%     
==========================================
  Files         194      194              
  Lines       19951    19977      +26     
==========================================
+ Hits        14745    14747       +2     
- Misses       5206     5230      +24     

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[marc2332]

should probably use u8