Enhancement: Compile Phar

[localheinz]

This pull request

• adds a phar job and a phar target to Makefile for building twigcs.phar

[codecov-commenter]

Codecov Report

Merging #236 (ae78e61) into main (ce6f948) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main     #236   +/-   ##
=========================================
  Coverage     78.57%   78.57%           
  Complexity      743      743           
=========================================
  Files            54       54           
  Lines          2385     2385           
=========================================
  Hits           1874     1874           
  Misses          511      511           

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[localheinz]

Thank you, @Ciloe!