[16.0][ADD] shared_custom_stages: add new module

[WesleyOliveira98]

@Escodoo P&D-167

cc: @marcelsavegnago @CristianoMafraJunior @kaynnan @douglascstd

[codecov]

Codecov Report

❌ Patch coverage is 92.85714% with 8 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (16.0@00e9c8c). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
shared_custom_stages/models/shared_custom_stage.py	79.16%	3 Missing and 2 partials ⚠️
shared_custom_stages/models/unified_task_ticket.py	92.59%	1 Missing and 1 partial ⚠️
shared_custom_stages/models/shared_stage_mixin.py	85.71%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             16.0      #23   +/-   ##
=======================================
  Coverage        ?   92.85%           
=======================================
  Files           ?        9           
  Lines           ?      112           
  Branches        ?        6           
=======================================
  Hits            ?      104           
  Misses          ?        5           
  Partials        ?        3           

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[marcelsavegnago]

@WesleyOliveira98 consegue adicionar testes ?

[WesleyOliveira98]

@WesleyOliveira98 consegue adicionar testes ?

@marcelsavegnago done