1454 feature request jdk21 upgrade + virtual threads core rewrite

[MohabMohie]

No description provided.

[codecov]

Codecov Report

Attention: 140 lines in your changes are missing coverage. Please review.

Comparison is base (07cc9da) 51.22% compared to head (d6dab44) 51.39%.
Report is 1 commits behind head on main.

Files	Patch %	Lines
...aft/gui/element/internal/ElementActionsHelper.java	64.23%	27 Missing and 22 partials ⚠️
...aft/gui/internal/image/ImageProcessingActions.java	25.00%	14 Missing and 1 partial ⚠️
...ain/java/com/shaft/gui/element/ElementActions.java	50.00%	8 Missing and 1 partial ⚠️
...m/shaft/tools/io/internal/ReportManagerHelper.java	65.38%	4 Missing and 5 partials ⚠️
src/main/java/com/shaft/cli/FileActions.java	55.55%	7 Missing and 1 partial ⚠️
.../com/shaft/tools/internal/security/GoogleTink.java	0.00%	6 Missing ⚠️
...ava/com/shaft/gui/element/AsyncElementActions.java	69.23%	4 Missing ⚠️
...performance/internal/LightHouseGenerateReport.java	0.00%	4 Missing ⚠️
...c/main/java/com/shaft/tools/io/PdfFileManager.java	42.85%	3 Missing and 1 partial ⚠️
...aft/tools/io/internal/ProjectStructureManager.java	63.63%	4 Missing ⚠️
... and 13 more

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1455      +/-   ##
============================================
+ Coverage     51.22%   51.39%   +0.17%     
- Complexity     1306     1321      +15     
============================================
  Files           108      108              
  Lines         10232    10191      -41     
  Branches       1042     1019      -23     
============================================
- Hits           5241     5238       -3     
+ Misses         4346     4315      -31     
+ Partials        645      638       -7     

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