Add Split Item

[Lynesth]

No description provided.

[codecov-io]

Codecov Report

Merging #125 into master will decrease coverage by 10.79%.
The diff coverage is 7.27%.

@@             Coverage Diff              @@
##             master     #125      +/-   ##
============================================
- Coverage     97.04%   86.24%   -10.8%     
- Complexity      356      416      +60     
============================================
  Files            23       24       +1     
  Lines          1117     1287     +170     
============================================
+ Hits           1084     1110      +26     
- Misses           33      177     +144

Impacted Files	Coverage Δ	Complexity Δ
src/MenuItem/SplitItem.php	0% <0%> (ø)	40 <40> (?)
src/CliMenu.php	84.81% <21.05%> (-7.61%)	92 <3> (+12)
src/CliMenuBuilder.php	94.83% <36.36%> (-3.57%)	64 <4> (+8)
src/MenuStyle.php	96.81% <0%> (+0.02%)	70% <0%> (ø)	⬇️

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[AydinHassan]

Handled in #127