feat: Add supportTerminateDebuggee

[zobo]

Implement optional stop of debugee after VS Code UI is available from microsoft/vscode#116731

[codecov-commenter]

Codecov Report

Merging #549 (5320e6e) into main (144f333) will increase coverage by 0.06%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #549      +/-   ##
==========================================
+ Coverage   66.57%   66.63%   +0.06%     
==========================================
  Files           6        6              
  Lines        1098     1100       +2     
  Branches      172      173       +1     
==========================================
+ Hits          731      733       +2     
  Misses        367      367              

Impacted Files	Coverage Δ
src/phpDebug.ts	67.27% <100.00%> (+0.13%)	⬆️

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