Refactor out fuzzy string logic to an internal facility

[ascopes]

This refactors out some really annoying code I duplicated in a few places so that it is now reusable.

Need to just verify the rewrites don't impact path matching on Windows (hence the PR to verify first, as I am working on a Linux box).

[github-actions]

Test Results

  2 333 files  +12    2 333 suites  +12   2s ⏱️ ±0s
28 232 tests +72  28 003 ✔️ +72  229 💤 ±0  0 ❌ ±0 
28 542 runs  +72  28 313 ✔️ +72  229 💤 ±0  0 ❌ ±0 

Results for commit 1ce2ea6. ± Comparison against base commit a029ae9.

♻️ This comment has been updated with latest results.

[codecov-commenter]

Codecov Report

Merging #424 (1ce2ea6) into main (a029ae9) will increase coverage by 0.89%.
The diff coverage is 49.01%.

📣 This organization is not using Codecov’s GitHub App Integration. We recommend you install it so Codecov can continue to function properly for your repositories. Learn more

@@            Coverage Diff             @@
##             main     #424      +/-   ##
==========================================
+ Coverage   83.60%   84.50%   +0.89%     
==========================================
  Files          93       93              
  Lines        2971     2968       -3     
  Branches      242      240       -2     
==========================================
+ Hits         2484     2508      +24     
+ Misses        438      411      -27     
  Partials       49       49              

Impacted Files	Coverage Δ
...s/jct/assertions/AbstractContainerGroupAssert.java	100.00% <ø> (ø)
...es/jct/assertions/PackageContainerGroupAssert.java	40.42% <0.00%> (+8.75%)	⬆️
...pes/jct/assertions/ModuleContainerGroupAssert.java	37.50% <14.28%> (+17.50%)	⬆️
.../java/io/github/ascopes/jct/utils/StringUtils.java	100.00% <100.00%> (ø)