feat: add regex capture support

[cyrinux]

give the feature asked here https://github.com/hyprland-community/hyprland-autoname-workspaces/issues/69

This syntax is now supported

[title_in_class."(?i)foot"]
"emerge: (.+?/.+?)-.*" = "{match1}"

[codecov[bot]]

Codecov Report

Merging #73 (1eb12d8) into main (10ad640) will increase coverage by 1.56%. The diff coverage is 93.75%.

@@            Coverage Diff             @@
##             main      #73      +/-   ##
==========================================
+ Coverage   66.50%   68.06%   +1.56%     
==========================================
  Files           6        6              
  Lines         406      429      +23     
==========================================
+ Hits          270      292      +22     
- Misses        136      137       +1     

Impacted Files	Coverage Δ
src/config/mod.rs	91.11% <ø> (ø)
src/renamer/mod.rs	8.65% <ø> (ø)
src/renamer/icon.rs	95.68% <92.85%> (-0.19%)	:arrow_down:
src/renamer/formatter.rs	94.73% <100.00%> (+0.23%)	:arrow_up:

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