Run tinker code in subprocess

[josbeir]

This allows us to not restart the server on each code change that needs to be evaluated.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 63.82979% with 68 lines in your changes missing coverage. Please review.
✅ Project coverage is 83.50%. Comparing base (e1fcbe7) to head (ea56645).
⚠️ Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
src/Command/TinkerEvalCommand.php	45.12%	45 Missing ⚠️
src/Tools/TinkerTools.php	77.00%	23 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main       #2      +/-   ##
============================================
- Coverage     85.34%   83.50%   -1.84%     
- Complexity      572      621      +49     
============================================
  Files            30       31       +1     
  Lines          2191     2359     +168     
============================================
+ Hits           1870     1970     +100     
- Misses          321      389      +68     

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