feat: Refactor DiffRowGenerator, code cleanup

[petertrr]

• Get rid of builder in favor of constructor
• Code cleanup, docs cleanup

BREAKING: API of DiffRowGenerator has changed, constructor should be used instead of builder

[codecov]

Codecov Report

Merging #16 (e460393) into main (dce5b9e) will decrease coverage by 0.24%.
The diff coverage is 88.00%.

@@             Coverage Diff              @@
##               main      #16      +/-   ##
============================================
- Coverage     83.01%   82.76%   -0.25%     
- Complexity       99      101       +2     
============================================
  Files            12       12              
  Lines           518      470      -48     
  Branches         91       85       -6     
============================================
- Hits            430      389      -41     
+ Misses           63       57       -6     
+ Partials         25       24       -1     

Flag	Coverage Δ
unittests	82.76% <88.00%> (-0.25%)	⬇️

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Impacted Files	Coverage Δ
...n/kotlin/io/github/petertrr/diffutils/DiffUtils.kt	78.12% <0.00%> (ø)
...kotlin/io/github/petertrr/diffutils/patch/Chunk.kt	66.66% <ø> (ø)
...ub/petertrr/diffutils/algorithm/myers/MyersDiff.kt	89.83% <77.77%> (ø)
...kotlin/io/github/petertrr/diffutils/patch/Patch.kt	81.25% <100.00%> (ø)
...github/petertrr/diffutils/text/DiffRowGenerator.kt	92.68% <100.00%> (+2.16%)	⬆️
...n/io/github/petertrr/diffutils/text/StringUtils.kt	69.23% <0.00%> (-7.70%)	⬇️

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