UPDATE ProjectRoot to use named constructors, one for from CWD and other for when Project Root is specified

[DaveLiddament]

No description provided.

[codecov-commenter]

Codecov Report

Merging #88 (1fea215) into master (129e3cf) will not change coverage.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##              master       #88   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
- Complexity       482       484    +2     
===========================================
  Files            104       104           
  Lines           1493      1500    +7     
===========================================
+ Hits            1493      1500    +7     

Impacted Files	Coverage Δ	Complexity Δ
src/Domain/Common/ProjectRoot.php	100.00% <100.00%> (ø)	8.00 <4.00> (+2.00)
...c/Framework/Command/internal/ProjectRootHelper.php	100.00% <100.00%> (ø)	3.00 <0.00> (ø)

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